HP EliteDesk 800 G2 Desktop Mini Hardware Reference Manual page 29

22. Secure the HDD cage to the chassis with the three screws (3).
23. If your model is an EliteDesk 800, replace the secondary fan under the HDD.
a. Set the fan in place in the HDD cage (1).
b. Fasten the two screws to secure the fan to the chassis (2).
c. Connect the fan plug to the system board (3).
24. Align the HDD guide screws with the slots on the HDD drive cage, press the HDD down into the cage, then
slide it forward until it stops and locks in place (1).
Replacing an M.2 PCIe solid state drive (SSD) 23