As standard the MXG/MXP/MXS (MX Strada Series) dash displays are supplied with a 14 pin AMP connector and harness, and a 23 pin connector & contact only (no harness). The standard 14 pin AMP connection/harness is used for power, ground, CAN1+/-, USB and EXP (CAN expansion modules) and is all that most users require.This optional 23 Pin AMP connector and harness/loom makes installation easier by including pre-wired connections, with the 4 analogue, speed and lap channels all being terminated with 719 binder plugs. These can be extended using the 719-719 Extension Lead if required.Later versions of the the dash displays (1.2/1.3) use a different harness part number. The difference is easily identified by the colour of the connector - black plugs for earlier 1.1 models, and white plugs for later 1.2/1.3 models.The 23 pin AMP connection provides:Analogue channels 1-8SpeedLapRS232tx/rxDigital outputCAN2+/-