How do I re-insert the bottom left corner of the display assembly?

So I've successfully replaced the LCD on the iPad WiFi that I was working on, and everything works great, but I can't it the lower left edge of the display assembly into the case - it's like something is stuck there, however when I look, there is nothing holding it back. It's really annoying because I can't give it back to the client like this. Any ideas?

*EDIT* I've figured it out. The issue was in the clips, which broke off during disassembly. I bought a replacement kit of them for 0.34$ from my supplier, and it didn't quite work. So instead, I bent them down, so that they would bend up when pushed down with the screen. I replaced all the clips, and it worked like a charm!