You would think they would be following some type of wiring, plumbing spec's that they follow to do the job. With all the different coach's and floor plans they have maybe they do not follow the same runs for every coach.
If you look at there builds during construction most wiring seems to be uniform but same may very with same coach on line.
If you check the wiring part of these video's
Newmar Corporation sidewalls
Newmar Corporation slides
The times I have been on the tour different years wiring has not always been located same location thru walls, engineers must change routing in what ever year they are building, most all wiring I have been involved in has very find print on wires, to indicate what it is for and where its going, so which ever way it was run would not matter anyway.