Need info for Super Humbuckings on my 1977 Ripper. Would like Pictures of them with the covers removed. As I remember the windings are 90 Degrees to the poles (the 4 screws across the pickup you see as looking down on the Bass. Proper terminology?) Hard to describe them to people. Picture worth a thousand words. While I am here, There is a coil with a heavy screw thru it with nut at the other end in the wiring under the pick guard. What's that for?