Removing a few screws will remove this part and allow access to your RAM.
Use your fingers to push both battery release tabs away from the battery and lift the battery out of the computer.
Remove the four identical Phillips 3.4 mm screws from the memory door. These screws have 4 mm diameter heads rather than the 3 mm heads on the body screws.
Lift the memory door up enough to get a grip on it, and slide it toward you, pulling it away from the casing.