Play-button repair on a 730

Maybe anybody has any expierence with button repair on a 730. My play-button is loose on the right hand side, the left hand side is fine so the button still works, it looks like this

I took the hood of, and find a lot of screws on some board attached to the buttons (I suppose). What is the trick to get to this play button (the easy way) and see what is going on ?

I have seen this several times. Solved it by taking it completely apart.
Used hot glue, as that it flexible to repair.

Ralf, i think iā€™m gonna pass on that solution, leave it to the experts !