mp3 PLAYER

I'm about to hard wire a mp3 player into the factory installed radio on my '03 Durango. I'm looking for any kind of manual that whould show me the details of the radio, expecially the rear of the radio. The radio is a AM/FM stero w/ cassette tape player and single CD player and I believe it's made by Infiniti (not sure though). I need to hook a Chyrsler adapter into the radio's CD data port and I'm trying to confirm that this factory stero has such a CD data port. Any assistance would be greatly appreciated.