HP t620 PLUS Hardware Reference Manual page 26

12. To remove a SODIMM, press outward on the two latches (1) on each side of the SODIMM,
rotate the SODIMM up (2), and then pull the SODIMM out of the socket (3).
13. Slide the new SODIMM (1) into the socket at approximately a 30° angle, and then press the
SODIMM into the socket (2) so that the latches lock it in place.
NOTE:
with the tab on the memory socket.
20 Chapter 2 Hardware changes
A memory module can be installed in only one way. Match the notch on the module