Remove two screws (red).

Disconnect the FPC on the left side (green rectancle). You have to open the lever.

Remove the copper foil from the upper part, but do not remove it completely (pink rectangle).

The small round part on the bottom is the beeper. Free the connecting wire from the white duct tape. The beeper itself is glued in his place and can easily be removed by pulling.

On the left side is one FPC left. This connector can not be opened, the FPC must be removed by pulling (blue-ish rectangle)