some of the newer models have the usb/aux connectoin directly below the stereo, in between the 12volt/cigarette outpout. This would be an easier install than under the centre console. From what I understand I think it would be just into the back of the headunit, with an iso connection. You have the standard power and audio inputs into the back of the headunit, but you will see a couple of spare slots, steering wheel audio control, possible blue or green, not sure which is which, the other gap i assume is ipod/aux connection.
not sure what the part number is,as mine is in the centre console, and getting the time at the minute to dismantle and look would be hard. if I had of known a few weeks ago I could have checked.