Grommets on front door

Hi there, I'm trying to install aftermarket door locks and power windows. I tried fishing wires through the grommet on the door and ran into a problem. Instead of the grommet leading right into under the dash like i thought it would, it seems to have a connector in the grommet. The only two wires running out to the door are the speaker wires, but on the connector on the inside of the car, there are about 5 wires attached to it.

What I need to know is if all the wires there are necessary, or if I can somehow make room for the wiring harness for my locks and windows..

2006 Pontiac Wave, manual everything.. Any help is much appreciated as right now I'm at a standstill with the job and frustrated beyond belief.