Can somebody tell me where to hook up a 7in double din or any aftermarket CD player in a 2002 Infiniti Q45? The harness doesn't fit the connectors in the head unit, and in the head unit there are inputs and audio outs but the connectors I'm looking for are in the trunk connected to the amp. Somebody please help! I've been at this for over a month. I have utilized loc for aftermarket amp and subs but after a while it cut out, hence why I'm trying to install aftermarket mechless.