Bravo 3 (2003) O-ring shaft/spline placement ?

[DIY1111]

I always replace these rings each year but have had a brain f*rt ( always wonder if the hard drive is getting too old or just storing too much info ! ) and don't remember how many, where ? I've seen varied pix online - some with (2), some with (3). I do recall that nothing goes in the shallow groove.

Some help pls - thx

 

[Bondo]

Ayuh,..... 2 on the shoulder to lock into the gimbel bearing, 'n the 3rd at the end of the splines to help retain the grease in the coupler,....