Logic says the outlets on the curbside should be together. That doesn't seem to be the case here.
I have a schematic for the 110 for my 2016 Vegas 25.2. It shows that outlet on circuit 2B, which goes to the bathroom GFI, the outlet by the couch, microwave outlet and the outside TV outlet.
Call Thor and ask them to send all the schematics to you.
Have you considered leaving that outlet alone and just add a new one to the inverter?