There is a black box under the back deck, right behind the lock to release the seat back. The easiest way to do this is to check the color codes for the left and right rear speakers off the head unit. I don't know what they are, since I used RCA preouts of my aftermarket head unit to my amps, then just ran new speaker wire for my new speakers. But if you get the colors for the wires off the head unit, just look for those on the input side of the black box in the back deck. You can then just splice and tap in off of those right in to your speakers. You will need to replace the rear speakers, since they have a four input connector and a microphone to monitor clipping. THAT is what the Accoustic Feedback does..... when clipping is detected, the black box automatically adjusts the rear volume (bass, really) to prevent distortion and clipping. You can't just connect straight to the speakers since the microphone is part of the circuit. You'll see a little black spot on the speaker connector.