OK, so the glass is 26 5/8ths" by 25". It slides up in front of the screen and goes up a little behind the speakers, the bottom sits on the little wood shelf that sticks out at the bottom. The L shaped metal piece that goes under that little "shelf" (picture) screws in from the bottom to hold the glass in place.
Pic is of my KI cab, but its exactly the same as an MKII