Well I installed a new CD player, Sony CDX-F5700. Well thats besides the point.

Stock Head-Unit I had 6 speakers powered 2 front, 2 rear side panels and the 2 rear high center.
Sony Head-Unit, I now have 2 fronts and the 2 rear high center ones working. I did have one cable that I didn't hook up. It looks like a smaller version of a Radio Atenne, is that something for the rear speakers?

Here is a Pic: (Top one)


Link to the pic if the picture doesn't work.