The module has a 2-pin connection at the top just above the 'SMITHS' logo.
Smiths RVI - RVC Tachometer conversion board + calibration cable -566-
Smiths RVI to RVC Tachometer EXTERNAL conversion with calibration cable -573-
SMITHS NOS 52mm 100psi OIL PRESSURE GAUGE (KIT CAR/RAT ROD/BIKE/BOAT ETC)
AUSTIN A40 FARINA Mk1 (1958-1961) SMITHS NOS 80MPH SPEEDOMETER (SN4751/00 1600)
Land Rover Series 2a 3 Jaeger Smiths Engine Temp Temperature Gauge 560746 NOS
TRIUMPH GENUINE SMITHS NOS 2 INCH GAUGES BRASS SECURING NUTS & INSULATORS x 10