Traditional DB9 serial port or USB for tuning;

SDcard for datalogging ;

DB15 optional signals.

Two main DB37 connectors.

Top (MS3X) for sequential fuel and spark, plus control outputs.

Lower connector mainly for sensor inputs.

Internal view of case.

MS3 card installed on V3.57 board.

(MS3X not installed)

View of MS3 and MS3X installed on V3.57 board.

(Without case.)