3 & 4 on the CPC port.
3 is the furthest to the left on the top row and 4 is the furthest to the right on the second row (when facing it mounted in the CPC socket).
3 & 4 on the CPC port.
3 is the furthest to the left on the top row and 4 is the furthest to the right on the second row (when facing it mounted in the CPC socket).