Do not connect anything to the center terminal of the relay - it is empty for a reason.
Connecting a wire to this terminal will run 12V through the wire.
The negative terminal of the coil should only contain the black wire from the ignition module, and nothing else.
The positive terminal should hold the red wire from the ignition module, the capacitor wire, and 2 other wires.
The ignition module is mounted in between the engine and genhead, from the top.
There will be a white sleeve with 2 wires in it - black and red.
It is held in by 2 screws.
Click here for the schematic.