I painted it black and mounted it about an inch below the vent's edge. The trick is to find a screwdriver that is neither too long, nor too short.
I drilled a 1/2" hole near the rear, top of the cubbyhole just to the right of the steering wheel. Caution, there are wire bundles directly against the back side of this cubbyhole. I got on my back and slipped a piece of carpet between the plastic and the wire bundles before drilling very slowly through.
The ScanGauge's cable will just barely fit through this hole. Maybe a little filing first. Feed the cable up from the pedal area, through the hole, across through the gap above the steering wheel and the instrument panel, and directly into the right end socket of the ScanGauge. Fits perfectly!
Follow the ScanGauge instructions to complete the install. Plug the OBDII connector in, right above the gas pedal. It has a black plastic cover that flips down. It's located here.
The final install. I think it looks great in this location and I can see it easily through the steering wheel.