I had a chance to look above the panels on a 2015 Vista and it was pretty much open space after passing the thin little "panels in the cabinets above the dash.
My actual problem was they were simply laid on top of the side panels and after a few years had bowed down and keeping them up was my problem, so I did not really look at the wiring but just pretty much empty and full of hot air!
A heavy duty stapler solved the problem.
When it comes to getting the foam off stuff, that is one I have done a number of times and found it not fun if you don't want to ruin what's underneath the foam!
Tempted to use a torch but rejected the idea and went with pushing a screwdriver into the foam to "feel" around to locate the body of the light and try to then more or less gently pry the stuff off.
Doing it now, I might try my new favorite tool as it lets me cut things without lots of danger involved! Any chance you have an "oscillating tool"?
I'm finding lots of uses for it that I never imagined before I got one. I first got one as a gift of a Dremel brand and it died way too soon but I liked what it did well enough to replace it with a cheap one!
This one has all I need and has paid for itself many times. For foam or caulking, I love it as I don't have to push hard so it gets into too much force and I gouge things but the idea is that the blade moves in such tiny, super fast movements that it lets me clear foam off stuff without actually cutting nor gouging. Works great on RV caulking! Just tiny little strips as I get close to what I want to save?
Taking tiny little bites is really not bad--- if you are taking 20,000 bites per second!
It will be a mess but at least it might be a QUICK mess.
It's the only tool I can cut small wood with and know it won't cut my fingers! The skin on fingers has enough wiggle that it has never done any damage!