Slide the bottom shell towards the back of the camera to release the clips securing it.

Lift and remove the shell.

During reassembly:

Place the shell onto the frame so it hangs over the back about about half an inch (~13 mm), creating a gap near the center of the camera. This allows room for the clips to slide into place.

Push down on the shell and slide it towards the front of the camera to engage the clips—you should feel them slide into place.