Brian, In my last two vans i have fitted the tv cable in permanently, it has taken me about an hour each time but well worth it in the long run and easy enough for anyone competent with basic tools. The job is made easier if you have an onboard water tank as there is an overflow pipe which passes through the floor and is an ideal entry point for the cable, then just feed it behind cupboards, there is usually a gap to allow other cables waterpipes etc to pass, if need be unscrew door plates to hide cable and make a proper job of it. In my current van which is an Elddis Crusader with the tv unit in the middle on a turn table, i removed the wooden section at the back which houses the power socket, held by screws, drilled an hole through the wood and fed the cable through it, leaving enough spare to reach the tv. Fed it down to floor level and then left the rest of the cable rolled up under the bed out of the way. when i want to plug in i push it out the hole in the floor which is under the bed and pull enough coax out to reach the bollard. An easy job and works well for me. Just an idea for you to mull over and hope with a bit of routing you can adapt to your own van layout.