These are the leads from the Rally-Pac. From left, black is ground, green with red wire goes to the negative side of the ignition coil (distributor side), blue is clock power, and black female is switched ignition power that leads to the power post on the ignition switch. Switched ignition power operates the tachometer. Those smaller two-pin plugs are for Rally-Pac EL faces. They are tied to the EL instrument cluster faces.