Compaq PRESARIO 6000 - Manual (Page 70)

6–14 Getting Started
Upgrading the Computer
1. Open both latches of the memory module socket
1.
Opening the Latches on the Memory Module Socket
If you are replacing a memory module, put the new memory
module in the same memory slot from which the old memory was
removed.
If you are adding a memory module, install the new module into
the socket nearest the preinstalled module, and install additional
modules in the next available sockets.