For future reference if anyone else attempts this, tore everything apart today and this is what I found.
At least on my 2012, Wire routes from panel to the bedroom TV outlet, then to the converter outlet, then the refrigerator outlet, and then to the TV outlet above the entry door.
There is a second set of 110v wires connected to the TV outlet above the entry that I have no idea where they route to. Maybe some future roof connection?
I was able to separate the entry door TV wiring at the refrigerator outlet and re-feed from a new Xantrex transfer switch.
I also drilled a new hole in the floor below the sink and ran my inverter ground wire to a frame ground that already had a couple of other grounds attached.
Tomorrow I'll finish the transfer switch, can't finish the 12v power wiring because I'm waiting for a couple of wire lugs. Will be pretty easy to attach the 12V positive to the downstream side of the battery disconnect, with an inline fuse of course.