We have the same trailer. The outside coax inlet on the back will activate all the access points in the trailer. Just hook up your receiver to one of them and then connect that to your TV. In that situation, I would move the TV outside and hand on the outside mount and connect the box to the coax out there; assuming your satellite will need to be on the back side of the trailer for a good signal anyway.
"Take The Road Less Traveled"
2013 Rockwood Roo 233s
2017 Ford F-150 EB
I've been an RVer since 2007, Lifetime Camper
Gotta love the Outdoors, Disconnect and Enjoy Nature!