Answer:
1) Turn off the computer and the main power switch.
2) Unplug all wires connected to the system unit.
3) Wear an antistatic wristband and remove
all the screws from the back panel.
4) Remove the back panel and take out the motherboard tray
5) Insert the RAM sticks in the sockets near the processor.
6) Screw the back panel to the system unit.
Edmentum ;)