Lenovo ThinkStation P920 Tower Workstation - Manual (Page 124)

a. Lift the handle 2 on the rear of the chassis until it stops, and then pivot it as shown until it stops. The
PCIe card latch 1 is opened.
Figure 102. Opening the PCIe card latch
b. If needed, remove the appropriate metal slot cover on the rear of the chassis.
c. If the PCIe card slot has a retaining latch, press the card retaining latch downward to disengage the
latch.
112 P920 User Guide