HP ProBook 4230s Notebook PC - Manual (Page 66)

c. Gently press the memory module (3) down, applying pressure to both the left and right
edges of the memory module, until the retention clips snap into place.
9. Align the tabs (1) on the access cover with the notches on the computer (1), then slide the cover
in to close it (2).
The release latches automatically lock the access cover into place (3).
56 Chapter 9 Memory modules