Does this trailer have the plastic box that the power cable is stuffed into when not in use. This is the easiest place to run a coax cable into your trailer. On our old Triple E fifth wheel I drilled a hole through the plastic and installed a barrel in the hole. Ran a cable from the barrel to the TV inside the trailer, and now have an access point to connect to on the outside of the trailer.
Todd & Sheila and kids
2012 Surveyor SV-305
2012 Dodge Ram 1500 4X4 CC Outdoorsman