The last step of the Quay integration is on a dedicated page "prepare cluster":
content/2.1-prepare-cluster/_index.md
There was an architecture recap right before and then again after.
I suggest copying this small Quay Integration chapter on the previous "Prerequisites" page and remove this extra page.
content/2-install-prerequisites/_index.md
I don't want to mess up the navigation, so raising this as an issue for someone more familiar with the navigation & structure of the guide.