OBD2 Cable CAN Dual:
One OBD2 connection splits into two-gauge connectors allowing two gauges to be used as a dual. However, single FD and single SR gauges are not meant to be run as duals.
To determine the type of cable needed, look at the part number found on the back of your gauge.
The part number that begins with "C" select the CAN OBD2 cable.
The part number that begins with "PT" or "FD" or "SR" select the PT/FD/SR OBD2 cable.
NOTE: Most dual gauges will not function properly if split up and used as singles.