Your much better off routing it to the underbelly. If your sidewalls are metal, they are installed in “layers” and you’ll play heck trying to get them off without damage, Then there’s the issue of framing.
If your set on a wired camera, then I would Recommend doing it as above.
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.