That done, drill the aft plates slightly larger than the mount bolt.
You're in the home stretch!!
Reattach the seat back to the bottom with the original screws. This next step will require a certain amount of gymnastic/contortionist prowess. It will become apparent why very soon! Place the seat into the well and attach the front mounts loosely. Since the seat rail mount holes are larger than the mount bolts, I used lock washers and fender washers. As the bolt snugs down, it "indents" the fender washer and makes a secure fit. Wiggle the seat to align the aft holes. Use the original seat mount bolts and lock washers. You will notice that a certain amount of "seat sliding on the rails" is necessary during the final assembly stage to allow access to the mounting bolts and holes.
