Just curious if Patch Management automatically uses the relay servers I have set up. I only have the master server as a Patch Manager right now and I'm assuming it uses the relay servers just like it does for deploying packages, but it doesn't really say that anywhere during the process that I've seen. Can anyone verify that this is indeed the case?
Yes it does.
The Patch Manager is only used to download the knowledge base updates and the patches.
Then every communication/download/etc goes through the relays.