X2 on the seats. I'm amazed you still have the crappy plastic covering below the dash still in place. I pulled mine off long ago.... too hard to access the below dash wiring. Which...it seems...I am ALWAYS doing.
Back under the dash...years later. See my favorite dangling orange wire connected to what looks like a capacitor mounted on the upper right part of the fuse panel. Attached an updated pic. I did find a pic of a fuse panel on the internet with it plugged into one of the BAT slots (under the 30 amp brake fuse - which I've become very familiar with lately *&!$@*) which according to the owner's manual are for "radio capacitor" - added that pic as well. I guess my question is, mine hasn't been plugged in for years and I haven't noticed any radio issues. Anyone know what it is supposed to do?