have the old Seymour Duncan diagram of
Classic Stack (STK-S1) in the mid position?
It looks like the wiring colors are not the same as with the
diagram of the STK-S4 which I have tried to do. (I know...
thats the only STK diagram available in Seymour duncan website)
1 humbucker, STK-S1, 1 humbucker, 1 vol, 2 tones, 5 way switch