What are these holes used for??

Hey Guys,
                I recently got my rear bumper out and went to bolt it on but noticed that there are 6holes but only 4 mounting holes on the bumper.
I do remember pulling bolts out of thoes holes when i was stripping my car but just cant remember what they were holding.

The holes iam talking about are the ones circled, i thought i better find out befor i put my bumper back on just incase iam missing a mounting bracket but i dont think i am.



Thanks, Dayne

crap i circled the wrong ones, i was ment to circle the 2 outter ones that are at the same hight. Right on the corner

As has been said, those holes have grommets in them.
 
Off topic... hey ESK-74, see that white car in the background.. now there's an engine I would love to have under the bonnet of an Escort!! You should've done it mate.

ESK-74  hahaha not when its blown up 3 times and never ran right once

A mech for mazda here in Bris said he gets them in all the time, motor stuffed. Reckons the rotaries need to be flogged on a regular basis or they choke up & die.

lol yer dont think how you drive it there no good, it been built by mazfix twice and there there the ones that blew it up 2/3 times.

had race apex seals and all that mazfix recomended and they still tried to get out of not fixing it under warrenty