Thanks, yeah the mistake I made was I did test it on a piece of scrap for cutting, and it worked great, never thought about the size of the slot being wrong I guess, oh well.
Here are just some pics of the lock and acrylic over the bezel after cutting it to size.
The last pic is where I mounted the Volume control for the speakers, this worked out perfect I think, no one really sees it but its easy to get to if you need it, I found this to be really handy as alot of the games seem to be at different volume levels. Its mounted directly underneath the control panel underneath in the upper corner.