If the cable just pulled out of its connector, the first and easier choice would be to clean all the connections and install a new connector. Any RV repair dealer who installs satellite dishes should be able to do this. I know Camping World installs dishes, if you have one near you.
You will want to make sure they use heat shrink tubing to keep it water tight. Even if you end up installing a new cable you will have still to install new connectors.
FYI, a new cable can fished through, but remember that the original was installed when the coach was being built, and may be strapped down to avoid movement.
I would try the simple fix first.
Craig and Susan
Morgan Hill, CA 2007 Newmar Kountry Star 3910 towing a 1998 Ford Explorer. RVing since gas was 58 cents a gallon. Amateur Radio Operator (W6ADV) since 1962.