Underneath where the side trim was, remove the 6 silver-colored screws indicated. It is not necessary to remove the black screws.

Removal of the rear plastic frame can now be done. Start at the lower “foot” edge, and press gently along the length of the mating, perforated plastic front frame, while pulling gently upward on the rear frame. There are 3 hooks along the length of the lower edge to detach by this process. Then angle it up and remove the top edge last.