This is pretty much how you should be wired up... Photos from google search...
Taking it all apart to measure cable paths usually ends up in disaster...
Here is another diagram I found which is similar to the above one...
The best approach should be to hook a cable TV signal to the outside trailer CABLE connection.
Then your living room TV and bedroom TV should get a signal if you have the RED BUTTON on the TV ANTENNA Panel OFF.
Push the RED BUTTON ON on the TV ANTENNA Panel and now your BATWING OTA antenna will provide signals to the living room TV and the bedroom TV.
or something like that...