I'm trying to hook up a headunit and I'm looking for the wires for the speakers to wire them up and can't find what the wires in the harness??? Do they change colors from when the wires connect to the speakers to when the wires get to the back of the headunit or what. Any help would be appreciated ASAP I'm working on the car now and would like to finish it up. Oh and there is no harness it was cut off so everything has to be hard wired that's why I need to know this.