My first removable hardtop, and I have a question about the rear deck mounting bolts; these are the special bolts, with the hollow end to accept a small rubber "bumper". The owner's manual says that when the hardtop is off, to install the rear deck bolts into the deck (to avoid losing them, and presumably to plug the hole). The Owner's Manual, the AIM and the Judging Guide say to also install the o-ring - I found two sizes of o-rings in the bag with the bolts, one is about 1/16" cross-section and the other is about 1/8" cross-section. Both fit the bolt. Which is the right one for this application, and where do I place it (i.e bolt, deck, o-ring, flat washer, nut)?