The viewfinder is held on by the top body piece. To access it, the entire plastic body must be removed. Each piece (back, bottom, front, top) helps secure the next piece.

Remove the bottom panel's nine Phillips #00 screws:

Four 3x3mm black screws.

Five 3x6mm black screws.

This 3x6mm screw is hidden under the wall adapter cover.

Pull the bottom cover off.