Battery Clamp

[neeldub]

Hey guys, I recently had a garage replace my old battery with a genuine VAG one. As to be expected they somehow messed it up. Battery has been coded to the car etc so all good there. However it seems to be sitting a little loose on its resting place. The bolt goes thru the retainer however i can't seem to be able to tighten it down securely. Take a look at some pictures..Is there something missing below the slot where the clamp goes?

Many thanks