Have you ever gotten to the end of a pickup change, and then had the oh crap moment of thinking you may have put the neck pickup into the bridge position, and neck into the bridge position? Well I just did. The trouble is that I can't remember which case which pickup came out of. Is there an audible difference? If it helps, the pickups are SD quarter pounders for jazz bass. As it is, the lead formt he neck is red, and the lead from the bridge is white.