Remove the following six screws securing the logic board assembly to the upper case.

One 3.8 mm T5 Torx screw

Two 5.7 mm T5 Torx screws

One 5.6 mm T5 Torx screw (this one is silver and has a taller head than the others)

One 2.6 mm T5 Torx screw

One 3.2 mm T5 Torx screw

On reassembly, start all six screws but do not tighten any of them. Move the logic board around until all of the screws are centered in their holes and the ports are lined up with their openings in the side of the upper case. Then tighten all of the screws.