Marshall 25th Annivesar 6100

[Amp Kat]

Can you guys tell me where the center lug on the 3 spade connectors in front of the 4,8,16 ohm switch goes on this amp ? I get continuity between each leg of the switch and the switch is working but I think I have a bad connection on that middle spade connector but not sure where it goes and the schematic doesn't show it. I've tried to find it with the meter but get no continuity anywhere in any switch position.


Edit that is a 30th Anniversary not 25