Update SPO onboarding guide with links to verification scripts

Author: dlachaume

docs/root/manual/getting-started/SPO-on-boarding-guide.md

@@ -39,8 +39,8 @@ To participate in the Pioneer Program, you will need to:
 - Run an active SPO on the Cardano `preview` network for at least one epoch or one day. 
 - Set up a **Mithril Signer** node on the `pre-release-preview` Mithril network by following the [**Run a Mithril Signer node (SPO)**](run-signer-node.md) guide.
 - You can choose between the **Naive** (easier to set up) or the **Production** deployment models.
-- Wait for two epochs (or two days) before your **Mithril Signer** is eligible to contribute.
-- Verify that your **Pool Id** is listed in some of the produced certificates using the [**Mithril Explorer**](https://mithril.network/explorer?aggregator=https%3A%2F%2Faggregator.pre-release-preview.api.mithril.network%2Faggregator).
+- Wait for two epochs (or two days) before your **Mithril Signer** is eligible to contribute. Check that your **Mithril Signer** is registered by the Aggregator following [**Verify your signer is registered**](./run-signer-node.md#verify-your-signer-is-registered) steps.
+- Verify that your **Pool Id** is listed in some of the produced certificates using the [**Mithril Explorer**](https://mithril.network/explorer?aggregator=https%3A%2F%2Faggregator.pre-release-preview.api.mithril.network%2Faggregator) or following [**Verify your signer contributes with individual signatures**](./run-signer-node.md#verify-your-signer-contributes-with-individual-signatures) steps.
 - :warning: Follow our [**#moria**](https://discord.gg/5kaErDKDRq) Discord channel or our [**GitHub repository**](https://github.com/input-output-hk/mithril/releases?q=pre) for new pre-releases to install.
 - If you have any technical issues or would like to provide feedback, feel free to ask questions on the [**#moria**](https://discord.gg/5kaErDKDRq) Discord channel.
 
@@ -58,8 +58,8 @@ To get ready for `mainnet`, you need to:
 - Be an active SPO on the Cardano `preprod` network for at least one epoch or five days.
 - Set up a **Mithril Signer** node on Mithril's `release-preprod` network by following the [**Run a Mithril Signer node (SPO)**](run-signer-node.md) guide.
 - You **must** run the **Production** deployment model.
-- Wait for two epochs (or ten days) before your **Mithril Signer** is eligible to contribute.
-- Verify that your **Pool Id** is listed in some of the produced certificates using the [**Mithril Explorer**](https://mithril.network/explorer?aggregator=https%3A%2F%2Faggregator.release-preprod.api.mithril.network%2Faggregator).
+- Wait for two epochs (or ten days) before your **Mithril Signer** is eligible to contribute. Check that your **Mithril Signer** is registered by the Aggregator following [**Verify your signer is registered**](./run-signer-node.md#verify-your-signer-is-registered) steps.
+- Verify that your **Pool Id** is listed in some of the produced certificates using the [**Mithril Explorer**](https://mithril.network/explorer?aggregator=https%3A%2F%2Faggregator.release-preprod.api.mithril.network%2Faggregator) or following [**Verify your signer contributes with individual signatures**](./run-signer-node.md#verify-your-signer-contributes-with-individual-signatures) steps.
 - :warning: Follow our [**#moria**](https://discord.gg/5kaErDKDRq) Discord channel or our [**GitHub repository**](https://github.com/input-output-hk/mithril/releases/latest) for new releases to install.
 - If you have any technical issues or would like to provide feedback, feel free to ask questions on the [**#moria**](https://discord.gg/5kaErDKDRq) Discord channel.
 
@@ -77,8 +77,8 @@ To run **Mithril** on `mainnet`, you need to:
 - Be an active SPO on Cardano `mainnet` for at least one epoch or five days.
 - Set up a **Mithril Signer** node on Mithril's `release-mainnet` network by following the [**Run a Mithril Signer node (SPO)**](run-signer-node.md) guide.
 - You **must** run the **Production** deployment model.
-- Wait for two epochs (or ten days) before your **Mithril Signer** is eligible to contribute.
-- Verify that your **Pool Id** is listed in some of the produced certificates using the [**Mithril Explorer**](https://mithril.network/explorer?aggregator=https%3A%2F%2Faggregator.release-mainnet.api.mithril.network%2Faggregator).
+- Wait for two epochs (or ten days) before your **Mithril Signer** is eligible to contribute. Check that your **Mithril Signer** is registered by the Aggregator following [**Verify your signer is registered**](./run-signer-node.md#verify-your-signer-is-registered) steps.
+- Verify that your **Pool Id** is listed in some of the produced certificates using the [**Mithril Explorer**](https://mithril.network/explorer?aggregator=https%3A%2F%2Faggregator.release-mainnet.api.mithril.network%2Faggregator) or following [**Verify your signer contributes with individual signatures**](./run-signer-node.md#verify-your-signer-contributes-with-individual-signatures) steps.
 - :warning: Follow our [**#moria**](https://discord.gg/5kaErDKDRq) Discord channel or our [**GitHub repository**](https://github.com/input-output-hk/mithril/releases/latest) for new releases to install.
 - If you have any technical issues or would like to provide feedback, feel free to ask questions on the [**#moria**](https://discord.gg/5kaErDKDRq) Discord channel.