iFixit

Remove the single 2.6 mm T6 Torx screw securing the I/O bezel to the logic board near the RAM.

Carefully un-clip the antenna from the logic board near the PRAM battery.

Gently de-route the antenna cable through the hole in the logic board.

De-route the antenna cable from the clips on the logic board near the I/O bezel.

Lift the power button cables upward to gently pull the power button cable up and out of its connector on the logic board.

Remove the four 2.6 mm T6 Torx screws securing the I/O bezel to the logic board.

Pull the I/O bezel away from the logic board, minding any cables that may get caught.

Try not to handle the small steel EMI fingers on the logic board and I/O bezel, as oils from your fingers may cause interference issues. Before installing the logic board assembly, clean the EMI fingers to remove any oils transferred during the removal process.