Toshiba L455-S1592 User Manual page 55

NOTE For this model, Slot A is the bottom slot. Slot B is the top slot. If only
one memory module is to be installed, it must be installed in Slot A.
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
Getting Started
Adding memory (optional)
connector
latch
55