How to Tighten up the 6700 Casing??

[Torx]

Im sure you guys know what im talking about...
my casing is a little loose on the "half and half".
I can hold it with two hands on its side and open it up a little like a book.. now i know it didnt come like that from the factory and my only assumption is because of wear and use..

So is there any tightening screws hidden in this case i need to get to?
Or is it a plastic latching somewhere being worn down to cause this, thus resulting in a non-fix?