Kil lite pro button side panel loose

Hi, I need help. The plate on the fire button side came loose all of the sudden. It's supposed to "stick" to the body like the 2nd pic, but now it falls freely by itself on the bottom. I took a light and try to look at the bottom of the plate, but it doesn't seem like there's screws or glue, or anything to hold that side in place.

It's a new mod, and I only used it at home for like 2 days before this happens when I tried to unplug the button to connect with escribe.

https://imgur.com/a/UwSLdCU