Chosen Solution

I was cleaning my PS4 then this triangle thing snapped it was loose before I got into it. I want to know if it is important or how to fix it

It appears to be a cover for an indicator light.

That looks like the tab that’s for the PSU screw. Think its only function is to make it easier for the person to lift the screw out of the hole because I did test PSUs with no screws attached and they work.