For satellite hookup. You need a straight shot from the receiver to your dish. The "cable" input on the trailer's exterior probably goes to the antenna amplifier/switch so its probably not going to work. Very easy to install a dedicated cable from the exterior to the TV's location. Use a few connectors as possible for better signal strength.
I agree with no electric tongue jack needed but it's a lot of turning to raise or lower. Never used the water heater bypass in the three TTs we've had. Drain everything, blow out the lines and pour pink antifreeze in the sink traps, toilet and shower drain. No problems in many years.
