The antenna connector is a coxial connector. (Center pin with a 1/2 inch fine thread nut)
It can go anywhere. Depending on how tall your RV is. Some tall RV's they put a little rubber finger on the roof oh 7-18 inches long. Worthless.
Some owners put it on a mirror (I did with one of my Ham Antennas)
Some put it on the side (My CB antenna is mounted on the "A" pillar)
IF it goes to the roof WITHOUT and antenna you will have to tone it out to find it. Cable tracker device. use only the nut/shield. ignore the center wire. For the Transmitter when tracking the cable.