Lay your mouse down onto your work surface, making sure none of the clips re-engage.

Grasp the upper shell and partially lift up the right edge.

Pull the upper shell up and back to release the final clip and separate the upper shell from the lower case.

Still keep the two halves close together—a cable is still tethered to the upper shell.

To reinstall the upper shell, slide the front edge into place first, then press down around the perimeter of the upper shell to engage the remaining clips.