Step 10
Disconnect the trackpad and keyboard ribbon cable from the logic board, removing tape as necessary.
Remove the upper case.
Step 11 — Airport Extreme
Disconnect the three antenna cables attached to the Airport Extreme card.
Apple was kind enough to include a label showing where each color antenna cable plugs in - just make sure to look at this when reconnecting the antenna cables.
Step 12
Remove the single black T6 Torx screw located just above the Airport Extreme card.