Which Set Of Instructions Were You Following?

There are two sets of instructions for these sections. Which were you following?

The "Regular Instructions For Old And New Models"(aka Method A)

(Cutting 2 new doors on the back.)

Bottom Door | Middle Door | Edging

The "Optional-For-Older-Models" Instructions (aka Method B)

(Swapping a back panel to the front and only cutting one new door.)

Bottom Door | Middle Door | Edging