Solid state regulator conversion confusion!

Thanks for the great pictures! As I understand it, the first picture that has that bent in tab in the ground position which I have, is correct, along with the one that has the ground tang?
For use with a pre-70 type regulator, this is the correct one.
alt_rear_bearing_dimpled-jpg.jpg

The bent tab grounds the carbon brush to the housing.
upload_2020-6-16_22-50-35-png-png-png.png

Here's another view showing that brush holder is a part of the casting.
upload_2020-9-3_12-46-16.png