Carefully peel up the orange ribbon cable which carries the power and sleep signals, removing tape as necessary

Peel back the black protective sheath on the right side of the upper case. It is not necessary to fully remove this shield. Simply peel it back enough to access the screws beneath.

Peel back the black protective sheath on the left side of the upper case. It is not necessary to fully remove this shield. Simply peel it back enough to access the screws beneath.