If you have dish ready connection on the outside. You shoud have dish connection on the inside behind your main tv and a antenna connection. I would try a experiment. Two short piece of coaxl cables to the dish wall plate other end to the splitter and the other cable splitter to tv antenna wall plate It should be in the bedroom now. Make sure you turn off the antenna power booster. This is only a experiment, Cause your antenna on top of the trailer is still connected. Might work Don't know.... Ps if it works the splitter is for your main TV......