There are three types of rubber grommets, some like a doughnut with a slot all around it, some square with a slot all around it and some that require two pieces, one on top of the ears and one below. Just a simple trial should show you which way to instal them. Do keep the broad end of the metal eyelet that is inserted into the final assembly with the rounded shoulder against the mount. This prevents the screw from forcing the sharp edge of the eyelet into the mount and destroying the shock absorbing ability which will happen if you instal them with the sharp side against the mount.