You already have it, but I thought I would post it is a slim chance it would help you. These are the wiring diagrams from my 1966
owner's manual. One is the trailer, one is the converter, and one is the tow vehicle.
My 66 Trade Wind has 3 12v
DC circuits running lights, fans, furnace, fridge, water pump, etc. They radiate from the fuse panel.
And it has 2 115v circuits running outlets. There was a "spare" wire by the breaker box that was for a future AC. The AC is a dedicated circuit and a dedicated 20 amp breaker.
The tow vehicle circuits are separate again.
My trailer has white for 12v