Spin lock install

[TypeA]

I did a forum search and found pages of threads but no answers. Are the spin locks for a 986 side specific? The lock inserts I got from my local dealership say "L" and "R", awesome they dont say "D" and "P" eh? Anyway, the vague instructions on pelican parts states, "simply slide the insert into each side, and tighten down the pinch clamp with the shoulder bolt." Thats it, no mention of side specific or that the notches at the top of the insert must be lined up. Did the dealership sell me spinlocks for another model car or is the pelican "install" instructions just woefully lacking important details? Anyone know if the threads are coarse or fine? My bolts are fine but the hole seems coarse, which might explain why i cant get the bolts started. Just trying to wrap my head around the fact that maybe sunset porsche sold me the wrong install kit....