I have an original SS std idiot light gauge cluster that has been converted to SS optional gauges by the Tachman including new ciruit board. But, I need to know which wires on the 12 pin connector are moved around, also where to attach tach and alt leads. I know other wires are also moved. My factory wiring diagram only shows base model gauges, not optional. I have tried to follow circuits, but would feel better if someone who has done this can help. Maybe a picture? I am using a Painless 69-74 GM muscle car harness that has the wires labeled for each function, but I need to plug them into the connector correctly.