I just installed my mustang seat, and you are right getting
bolts in could be a pain. I just used a few screw drivers through the seat
to keep the bolt holes lined up and it went in .
The other things I found to be true is the catch at the front should be a bit lower
to allow it to catch the bar at the front. It all so is a bit of a pain to line up the release for
the bags.
But if you take your time it can be done.
I will add I had just taken my meds so it seemed easier than normal!
shortleg