Kitchenaid oven door

HI,
My husband and I just replaced the inner glass of my kitchenaid oven door. Everything was going well, but when we put back the middle glass, we’re finding it does not stay put. There seem to be no screws holding down the metal frame that goes over the middle glass before replacing the outer glass. Any suggestions? I checked the diagram for the door on the website, but it’s not clear about this section of the door.

I’d appreciate your help. Thanks!
Kitoven