Step 25 — Speakers
Lift the heat sink out of the computer.
Step 26
Peel up the left ambient light sensor cable from above the left fan, removing tape as necessary.
Remove the left fan from the computer.
Step 27
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.