Here is a neat pictorial showing the setup...
I had to install one of those TV Panels in my POPUP to make my BATWING antenna setup work... That was the first thing that happened to me on first trip... NO CABLE TV.... My panel is not in plain view so I didn't think to notice if the RED LED light was on or not...
I use the OTA Antenna when camping off grid and then I installed a CABLE TV receptacle on the side wall for when we are at camp grounds...
Roy Ken