The 23-pin AMP connector is used on MXS Strada, MXS 1.2 Strada, MXP Strada, and MXG 1.2 Strada street dash displays. You need access to this port for functions such as the digital output, CAN2 ECU connection, and RPM input (1.2 and MXP only). If you do not plan to connect any analog sensors, using this connector kit is much more economical than the entire auxiliary harness.