I assume you are speaking of what Apple refers to as the "Clutch Covers". From the service manual:
Before you begin, remove
the following:
•Main battery
•Display bezel
1 Cover the keyboard with
a clean cloth or sheet of
paper.
2 Using a T-8 torx driver,
remove the four display
mounting screws.
3 Remove the display
from the housing and
EMI shield.
4 Place the display face-
down on the keyboard.
5 Pull off the three clutch
covers.
6 Using a T-8 torx driver,
remove the six
mounting screws from
the left and right
clutches.
7 Remove the left and right
clutches from the
display housing.