A makeshift fix would be to solder the center connector back together being careful not to short the shielding to the center conductor. Wrap a small piece of aluminum foil tightly over outside of wire. Seal with clear nail polish or liquid electrical tape. In a pinch you could also use hotmelt glue. BUT... make sure the wire is not directly exposed to weather.
A "better" fix would be to get appropriate male/female connectors to splice onto the wire ends. But if you're not using it... go with plan A as a temporary fix.
It might be an XM radio antenna wire, although mine goes up through the roof near the Winegard antenna.
Be creative, and have a fun life...
...and don't be an @**hole! -Ken Block