Ok heres a shot of modified cas. It seems it will only fit one way so a 180* clocking error can't occur? You can see the single remaining tooth at approx 2oclock and the magnetic sensor at about 8oclock.
Heres a dodge effort at capturing the trigger wheel image.
The extra tooth is 9oclock. The sensor mounting hole is visible on the right, near dipstick and i believe it would be aiming at tooth (just visible) near it.
Hope it gives an idea of setup. Cheers