Dash Pad removal?

disconnect neg' battery cable. The retainer clip on the speedo cable is offwhite colored plastic and resembles 1/2 of a wooden clothes pin. Squeeze it to the cable sheathe and pull it straight away from the instrument. the 2 large wires on the amp gauge wear hex nuts and internal toothed washers. You'll need a 3/8 socket or end wrench on those.
The factory service manual would be a great help ( to both of us ) and it's a free download here somewhere. good luck