I'm a little baffled by these pickups. I came across these used and am trying to figure out what model they are and I noticed only one lead from both pickups. I stripped back the insulation and there are three wires inside. I'm assuming I use the white and black leads... But, I popped off the covers to see if there was a model number. Nope, but the entire pickup is covered in copper. Does anyone know what I'm looking at here? The cover indicates a SD Basslines pickup but, I've yet to see one quite like this. The only thing on the back of the pickup is a sticker. One says "bridge" and the other "neck"... that's self-explanatory! no other markings that addresses the model number.