I don't know your coach, but everyone I know of, all A/V cables meet at the front entertainment center in the front of the coach. As previously stated, they will all be joined at a distribution box up front.
If all the cables (ant in, catv in, front, rear, outside outbound, DVD, ect) are not labled, you're going to have some experimentation involved to get the inbound signal you want to that outside TV.
John & Clare Lyon
2007 43.5' Monaco Dynasty Palace III (All Electric)
Towd: 2011 Chevy Equinox