I'm would like to use the head phone jack. I figure with the sound system that the Xterra comes with, it would somewhat of a waste to simply use the fm modulator. The back of the rockford fosgate 6 disk changer has no aux input or open slots (inputs). I got the t conector hooked up (which I assume is for the power), but the main connector from the PAC unit has no where to go. Of course I could just be stupid.