I found on my 2013 CR ST 32RL 5th wheel that the outside TV connection at the rear of the trailer goes to the space between the upper cabinet just above the TV. I gently removed the bottom board panel of the cabinet and found that the outside coax cable enters a splitter and then branches off to the front bedroom TV and then to the main living area TV. This same splitter also connects to the Jansen stereo system.
Since I have a satellite View Cube with two coax cable connections, I removed the connection to the front bedroom TV from the splitter and installed a new connection in the side wall of our large side opening that allows the TV to spin and face the outside (outdoors). This way I can run two coax cables from the View Cube to the same spot inside next to the back of the TV and connect both TV's. I left the old coax connection from the rear of the trailer in place and connected. That way, if we ever stop in an RV park that has their own TV cable hook up, I can still connect our main living area TV to that system.
2015 Ford F-250 SD 4X4
2013 Sunset Trail 32RL 5th Wheel (no longer own)