Our antennae is missing and I don't see anything about it in the manual. I think it is for the radio. It screws into the base on the camper roof. Does anyone know about this and where to get a new one? Thank you. This is for a 2009 X210WBS.
That is the radio antenna. You should be able to find a replacement at your local auto parts store or Walmart. And of course Amazon. Just look for a generic automotive radio antenna.
I replaced mine with one from Autozone. There are different threads between available antennas. Chances are the swivel base is still there on your trailer roof. It attaches with a phillips head screw. If you remove the swivel piece and take it with you, you can be sure to get the right fit.