If you take a look at the top or engine bay side of the wiper motor. There are three (going from head) phillips screws that you can loosen. Simply line the mark on the top plate with the locations listed in the photo and then your 3 speed wiper motor works with any of the labeled body styles.
As far as I remember these are the right locations. The pictures from rick eherberg (sp?) But no longer posted so I had to recreate from memory. The A body spot is correct as I used a c body motor on my A