Here's a couple pics of the switch box. You have to have your sat. signal coming into the back of the box, and press the TV 2 "Sat" switch in. The signal goes to the rear TV from there. I don't know if you have the same, but it should be similar if factory wired. Good luck.

Don't spill your popcorn in bed!
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Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back.
Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand!