If the construction of your 2022 is anything like our 2016 2250, there is nothing related to wiring in the exterior walls. The source is from the converter/charger/distribution panel, where both 12VDC and 115VAC are routed through and under cabinets, and up into the channels within the expanded foam in the ceiling/roof module, then dropped into other cabinets or interior walls.
If you are working on the interior walls, look in openings under/in cabinets for wiring bundles before drilling.
Here's an example of wiring behind drawers in the wardrobe/pantry cabinet:
and another wall, which is full of wiring...
Good luck getting a wiring diagram from FR, particularly that shows the actual routing for your model.