Drewman521

Can anyone tell me the model number of the Sony Head unit that is installed in the Ford Edge Limited for 2011 (12 speaker version)? I am interesting in adding an AMP for a speaker box in the rear of the vehicle and wondered if there are RCA jacks in the back. I thought I'd ask before tearing into it. Looks exactly like this. http://cdn.hightechdad.netdna-cdn.com/wp-content/uploads/2012/07/HTD-2012-Ford-Edge-52.jpg Thanks.