I want to put something "useful" in that spot. It's either a mount for a sirius/xm unit, or a gauge. I think I have seen a voltmeter mounted there, but I can't find that post no matter what I search for. I do suck at forum searching though. I just ordered a bunch of stereo gear, so a voltmeter may be handy, right? Anyone have a link to someone that has done this? Or any ideas on something else cool to do?