Cutting Edge (get it?)

This is the wiring board for the controller. It takes care of pre-charge, main contactor driver, key switch and fault latching.

Practically all motor controllers have a large number of capacitors on their input. The purpose of the pre-charge circuit is to charge these capacitors up slowly before closing the main contactor. If you don't, there will be a huge inrush current which will hurt both the main contactor and the controller. The controller can in fact "blow up".

Here's the schematic for the wiring board.
Schematic

When you turn the key to on the 12V comes up, which, closes the KSI relay and the pre-charge relay. When you turn the key to the start position the ignition relay will turn on and latch on, the ignition relay then drives the main contactor coil.

The car has a RPM counter with an over speed detect circuit for protecting the motor from over speed conditions. There's also a pedal controller circuit which may signal a fault if there are any electrical problems detected. If either of these circuits indicates a fault, the fault relay will interrupt the ground to the KSI relay, pre-charge relay and ignition latch relay, thereby disabling the controller. The relays are configured such that the KSI relay will open first, disabling the controller before the main relay opens. This way the main contactor will hopefully not open under full load.