Another clutch not completely disengaging thread

I have yet to get my car running yet but i was curious why you have the shims on before the billet slider? Not that I’d think I matter but if I recall the instructions say to slide it in first and tighten the set screw then shim to specs. I won’t have my car running for a couple months but I will be following this thread.
I didn't get any instructions but going off all the threads i have read and images online they all had the shims first, i don't recall seeing the slider on first in any of the pics i have seen