Hi Dave- I don't have the Bose system in my truck. I haven't taken out the stock deck yet cause its still in the shop till Tuesday but im trying to prewire the headunit to the harness I purchased. I mean when I take out my stock deck im gonna be replacing the harnesses that are in there with the one I purchased right? When I get home ill take a picture of the unit wires and the harness wires to show you what I mean. I just don't know why the harness would have RCA plugs on the speaker wires to get connected to a head unit that has just regular wires. It does have RCA inputs on the back of the unit, can I just plug them in there? and not use the speakers wires from the part that plugs into the HU itself?