Two hours of telling myself “the definition of insanity is doing the same thing expecting different results” and I finally got it.
There is no real trick, some BMW 2002 owners, after a bit of research, also mentioned the difficulty in getting the torsion spring through the clip and to seat.
Only advice I have is to flatten the portion of the spring that goes into the clip ever so slightly.
I had to subsequently take a ride and pick up celebratory supplies.