FYI I undertook the one-time effort to run everything inside my RV because I didn't want a cable running up the backside of my Escape 5.0's molded fiberglass shell. The harness is super-long (like 40+ft).I'm sure I can figure out how to run the wire,
I ran it all hidden in the back of cabinets front-to-back and drilled / sealed one hole through the shell adjacent to the cam mounted over the rear window (there's an overhead cabinet above the rear window).
I routed the TPMS receiver branch to a spot over the axles in a lower cabinet. Everything works fantastic and the only evidence is the cam itself on the outside.