You need to tell us which ant it is you will have three a CB, Radio and the TV ant.
Inside you should be able to see the TV ant location on ceiling and may find cable.
If you need the ant install a JACK HD ANT
The CB you might as well install a new one
on side of coach, like this one.
A radio ant you can install into the upper right hand cabinet and run down the "A" channel
next to corner of windshield and window.