First one is for the harness that goes up to the handlebars. It has 8 pins, which are five for the LCD that includes the common ground, 5v, brake sensor and throttle. The harness branches into 4 connectors at the handlebars. The other (yellow) is for the pedal sensor.OK, I attach photos of the two leads, the yellow one I presume is the PAS, and the black connector is an 8 pin .