HP Compaq NC6110 Hardware And Software Manual page 134

9. Insert the new memory module:
a. Align the keyed (notched) edge 1 of the memory module
b. With the memory module at a 45-degree angle from the
Hardware and Software Guide
with the tabbed area in the memory slot.
surface of the memory module compartment, press the
module into the memory slot until it is seated 2.
Hardware Components
5–23