Where does this piece go repairing ps4 slim cd drive

I had the similar problem while repairing mine as well but found it out after sometime. Position the arm cover plate so that you can see the black arms. Push outward on those arms and slide up on a white stick on the under side of the plate which will be located under your right hand. Flip the plate over and there should be a raised bracket thing in the middle. Slip that coin in it aligning its grooves into the bracket and then slide that white stick down to lock it into place. That coin is like a weight thing that securely keeps the disc in place while being read.

Here’s also a vid link of legendary Steve showing drive components: (2:18 - 2: 25)

https://www.youtube.com/watch?v=yWeWXytb...