The glass might have space to slide up into the marquee area while also resting on the monitor shelf.
Yes it does, but is it safe to leave it like this? Nothing hold glass back. What if machine it tipped forward, then it could fall out.
With a dedicated KI cab, the glass slides up behind the speaker wood a little, and rests on the shelf at the bottom. When the control panel bolts up there is a little piece of metal attached to the control panel that holds the bottom of the glass in place. In the unlikely event the machine tips forward, the glass wont move.
Why would you ever tip the 400lb machine that far forward anyway?