I have this old Hohner 5 string that has been sitting around. Its been defretted but the problem is the electronics. It has an EMG Select setup with volume volume bass treble. Then it has an on-off switch for the active system and an LED for status of the active. Well, the wires have been cut and god knows where everything goes. Is there some place I can find a wiring diagram or some help on putting this thing back together?