Step 10
Disconnect the trackpad and keyboard ribbon cable from the logic board.
Remove the upper case.
Step 11 — Airport Extreme
Disconnect the two antenna cables attached to the Airport Extreme card.
The cable with the gray shielding attaches to the left side connector, while the cable with the white shielding attaches to the right side.
Step 12
Remove the single black T6 Torx screw from the top right corner of the Airport Extreme card.