HP ProDesk 600 G2 Hardware Reference Manual page 23

a. If you are installing an expansion card in a vacant socket, remove the appropriate expansion slot
cover on the back of the chassis. Pull the slot cover straight up then away from the inside of the
chassis.
b. If you are removing a PCI Express x1 card, hold the card at each end, and carefully rock it back and
forth until the connectors pull free from the socket. Pull the expansion card straight up from the
socket (1) then away from the inside of the chassis to release it from the chassis frame (2). Be sure
not to scrape the card against the other components.
Removing or installing an expansion card 17