Fix broken rescue mode button?

Hey all, as part of trying to address this update bug, I was going to do a firmware flash as described in the manual. When I was pressing the button, the button seemed to break and fall out. After shaking to try to get the pieces of, I have the following pieces of the button in the included image. I think I can reattach them but I’m not sure. Are there any instructions on how to fix this?

This is how the button looks: