Removing the heat shield enables access to the RAM and the processor below.
Turn the computer so that the ports are facing you.
If the keyboard is locked, open the port cover and turn the keyboard locking screw until the keyboard is unlocked.
Pull the keyboard release tabs toward you and lift up on the keyboard until it pops free.
Lift the keyboard out by pulling it up and away from you. Rest the keyboard, face down, on top of the trackpad.
Remove the three silver Phillips screws that attach the heat shield to the internal metal framework.
Lift the heat shield up and pull it toward you.
Your laptop should look approximately like this.