I was told that I would have to buy an optional harness from the plug to the solenoids. But from what it looks like, if you could get a plug that matches your harness you would wire them like so
Pink wire-- +12v for N2O enable
Red wire -- to +12v source
Orange wire – to positive side of 1st stage nitrous solenoid
Brown wire –to positive side of 2nd stage nitrous solenoid (if used)
Let me know how it works out as I will be using the N2O option also