Best way to add a cable pass through/access in camper.

Use the term "roof cable entry gland" to search on ebay or other...



Have you looked at running wires through the refrigerator stack? I have run solar down that way, just make sure the wires to not invite water in and that the screen still keeps bugs out and does not cut the wire coating.

For coaxial cable you can use the outside wall plates to connect a cable on the outside and a cable on the inside, they should be water tight...