Re: REC radio in a 2005 wk
You should have a 22 pin connector and a 10 pin connector on the back of the radio, as well as the GPS antenna plug and the Terrestrial radio plug. If it is an '07, it may also have a 4 pin connector on the back, which is for the Jeep back-up camera hook-up.
The 22 pin connector is for your audio signal wires, power, UConnect, etc.
The 10 pin connector is for the Sat and rear DVD.
If it has a 3 pin connector, in place of the 4 pin, this is for factory software access, only.
Either way, '05-'07 should plug and play.
Hope this helps,