just buy a 2.0 in male adapter (PVC) and sand down (the side with the threads) until your gauge fits snug. drill two holes and bolt to the steering wheel post. see the pic. the led in the center is wired to the blinkers so it flashes when either of the blinkers is on and the red switch on the rhs is the switch that turns on my flashing led to give my z the after market alarm look.