It’s been awhile since I did one but the way that worked for me was:
1- Fit the spring into #16, the Equalizer Cup
2- Slide that over the Spindle making sure the spring is around the lip/ridge of the spindle
3- Slide that whole assembly into the pulley lining up the pin on the spindle with the hole in the starter housing
4- Rotate the Equalizer cup counter clockwise as close to the pawl as possible to attach the springs
5- Screw down the spindle