Step 10
Disconnect the trackpad and keyboard ribbon cable from the logic board, removing tape as necessary.
Remove the upper case.
Step 11 — Optical Drive
Disconnect the orange SuperDrive ribbon cable from the logic board, removing tape as necessary.
Step 12
Remove the following 3 screws:
Two 3.3 mm silver Phillips screws on either side of the SuperDrive.
One 4.8 mm black Phillips screw at the top right corner of the drive.