Fujitsu PRIMERGY CX2550 M6 Upgrade And Maintenance Manual page 241

System board and components
Figure 165: Installing the M.2 SSD (A)
▶ With the label facing up, insert the M.2 SSD into the M.2 slot at a slight
angle.
▶ Align the key pin with the M.2 slot.
Figure 166: Installing the M.2 SSD (B)
▶ Secure the M.2 SSD by closing the locking latch (see arrow).
Upgrade and Maintenance Manual 241