Okay, let me clarify this. Going into the factory radio in the back on the side closest to the steering wheel is a bundle of wires which terminate into three plugs. The bottom of these plugs is black, the middle is brown, the top is three colors and looks like three small plugs connected together. This tri-color plug is the one I am interested in. Since the wiring harness adapter thingee I bought to connect to my new radio only fits the brown and black ones. Am I to assume that the top three-color plug is unimportant? That's all I really need to know. Thanks.