Trigger wheel. Reluctor. Sorry about that.
Lynn E. Hanover
I found a previous posting talking about ways to set TDC, so I rotated the crank to put the counterweight at 9 O'clock and at the same time checked for air blowing out the #1 spark plug hole.
In another post I found a diagram that shows the TDC position on the position sensor plate three teeth after the single flat spot.
You can see both ends of the crank in the two pictures. I think it is correct.
Chris