Mongy

I have searched for days and days on still havent found any information I am looking for.

I bought an aftermarket headunit. I also got the receiver adapter harness so its all plug and play. Easy enough.

I have the stock infinity sound system. I have brand new Kicker 3.5 in the dash. I keep hearing people say rip everything out and run all new wires, bypass the amp, etc etc. I do not want to run all new wires. I want to keep my dash speakers, REPLACEMENT the front door "subs", and replace the rear speakers. Problem is the amp only supplies bass to the front door speakers.

My question is this. How are the speakers wired? On the stock harness AND the new receiver harness there are only enough speaker wires to run 4 speakers. With the infinity there are 2 more speakers to run. (I took the middle tweet out). WHEN I do replace the door speakers I will run new wires to the head unit but which wires to I hook them too. I want to run everything off the HU. If that possible?