The casing reveals the primary buttons for the navigation controller.

The top two buttons are for the X and O which only have a piece of white plastic covering the buttons.

Just below is the cover for the d-pad. It will reveal underneath a the same type of plastic with a ribbon circuit sandwiched in between the hard plastic and the d-pad buttons on protruding from the casing.

In the middle is the PlayStation button, and like the X and O buttons. Only has the white plastic piece in between that and the board.

Finally, at the very bottom is the piece that extends the red power light to the outside of the case. the joiner is removable and can easily fall out so try not to lose it.