Unscrew the single 2.0mm Phillips #000 screw located on the dark brown strip on the back of the shutter button panel.

Once the Phillips screw is removed, gently take off the metal component with your hand or a wedge tool.

The on/off switch is not connected to the metal component, so be sure to keep track of it when removing.

Once the metal component is removed, the shutter button should be the only remaining part connected to the black shutter casing.