Questionable cord and sunroof drain
 

So I pulled headliner and I am about to paint it but in the process i found a cord I did not disconnect and was just hanging. It looks like an antenna cable that goes into the back of the radio or plugs into the actual antenna. I know sometimes they run all the same wiring regardless of model and just leave if the vehicle doesnt have the options needed for the hookup. Also I have a wet spot on my drivers side floor area. I was wondering if that could be from the sun roof drain?

Navigation antenna? Not sure what year that became an option.

It looks like an aftermarket antena like for a cb radio.