Just a little bump on this. Have got the cluster working but 3 wires on connector B aren't hooked up.
I have no connector for the ones marked: 12. W-B Fuel sender ground (it's earthed on another wire), 6. B-W Starter (ignition switch st1) as it says it's unecessary, 4. EFI Computer (no idea what this would do)
Also, for the speedo to work does it only need ignition power, a functioning speedo cable and for the cluster to be earthed on 'Pin 2. BR Ground (JB NO.1 SET BOLT)' Or will it need something additional?