In the box was a bracket. It and a few other engine mounting parts were inadverntenly still attached to the internal combustion engine when I sold it. When the engine was removed. the part is neatly snuggled into position. Unlike the colored drawing below, everything was black with grime.
Here is the bracket in the car. Temporally, as it will need to be modified for the electric motor mounting.
Once that blocking issue was out of the way, we put the motor into position for fit checks. Next step is to design the passenger side engine mounting adapter.