Well if you bought the premium sound harness, then you bought the harness to integrate your factory amp with the aftermarket radio. The harness you are looking for is called a Premium Bypass Harness and will have 3 parts. One part is for the power wire hook ups, the second part is for the speaker wire hook ups, and the third harness is to bypass the factory amp. I have these harness for $10 to all the CEG'ers. email me at jason@asg-co.com if you want one. You will just need to return that other harness to whom ever you bought it from