Usually this is where the confusions sets in, so hard to make sure we’re talking about the same thing. To keep it simple, let’s only talk about the xAC access controller v2.
In order to have it output a +12v like the v1 model did:
Ground is ground.
Relay common and xAC positive input are both connected to the +12v source.
Relay N.O. is connected to whatever load you wish.
No diode is necessary on the N.O. output. The v1 needed it, the v2 does not.
If your questions are about your circuit instead, then I’d really need to set down and understand it myself first.