Shahid, the bolts are only just long enough to start with but once assembled are fine. You have to put the bolts through the mount and into the rubber section BEFORE the parts are fitted to the bulkhead. Even like this you may have to give the rubber nuts a squeeze to get them started on the threads.Only wind them on about 1 turn before then feeding the rubbers through the holes in the bulkhead & then tighten them up.

Jim