How to add custom network in the new UI wallet version

[tropicar]

I am a dappnode developer, we had the UI-wallet connect automatically to the node you can install in dappnode.
How you can define in the code a custom network in the file constans.ts? I tried to modify the default but it overrides it. So, How is possible to add a custom network from the code, to avoid the user having to add a custom network.

export const MainnetConfig = new AvaNetwork(
  "Mainnet dappnode node",
  "http://avalanche.avalanche.public.dappnode:9650",
  1,
  "https://explorerapi.avax.network",
  "https://explorer-xp.avax.network",
  true
);