Remove this last screw holding the back plate on the port side.

On the other side peel the top corner of the back plate to see the last screw you need to unfasten.

There are 5 screws in total holding the back to the camera: 2 screws next to the ports, 1 screw behind the port cover (left), and 2 on the other side, 1 of which also holds the bottom plate.

Gently remove the ribbon connecting the back to the main board.