HP Compaq Series Hardware And Software Manual page 110

Memory Modules
9. Insert the new memory module:
a. Align the keyed (notched) edge 1 of the module with the
b. With the module at a 45-degree angle from the surface of
c. Press the module downward 3 until the retention clips
8–4
tabbed area in the memory module slot.
the memory module compartment, press the module 2
into the memory module slot until it is seated.
snap into place.
Hardware and Software Guide