The starter solenoid usually has four terminals-two large ones (at top and bottom) and two small ones. The Large top terminal (post) is for the battery cable connections, the lower large post goes tot he starter motor. The small S terminal engages the starter, via the ky switch, using the Yellow/Red wire. the small terminal opposite the S is the R terminal, which goes to the coil. Some of the newer solenoids are no longer equiped with the internal jumper that povides the current to the terminal during cranking.
The ignitor module: the black wire goes to the "-" post on the coil and the red wire should go to the purple wire coming from the key switch to the ballast resistor. the other end of the ballast resistor goes to the "+" post on the coil.