Yeah they go in the void in the original mount, to stiffen it up, but i am sure they only go on the rear 2 mounts. So if it is one of the front mounts they will be no good anyway.
I have recently fitted solid mounts to mine.
http://www.bakerbm.com/306.php?data=suskit306a
I have recently fitted solid mounts to mine.
http://www.bakerbm.com/306.php?data=suskit306a