Toshiba Satellite A200-0MD00X Resource Manual page 27

Avoid touching the connector on the memory module or on the
computer. Grease or dust on the connector may cause memory
access problems.
9 Carefully remove the new memory module from its antistatic
packaging, without touching its connector.
10 Locate an empty memory module slot on the underside of the
computer.
If no memory slot is available, you must remove a module by
performing steps 2-3 of "Removing a memory module" on page 29.
If your system has the memory modules stacked on top of one
another, you must remove the top module before removing/installing
the bottom module.
11 Pick up the memory module by its sides, avoiding any contact
with its connector. Position the module toward the socket,
aligning the connector's notch with the matching key in the
socket.
notch
latch
key
(Sample Illustration) Aligning the memory module with the socket
12 Firmly press the memory module into the memory slot's socket
at approximately a 30-degree angle (to the horizontal surface
of the computer).
(Sample Illustration) Inserting the memory module into the socket
Adding memory (optional)
connector
latch
27