Lenovo ThinkSystem SR550 Maintenance Manual page 146

Figure 108. M.2 drive installation
Step 1. Insert the M.2 drive at an angle of approximately 30 degrees into the connector.
Note: If your M.2 backplane supports two M.2 drives, insert the M.2 drives into the connectors at
both sides.
Step 2. Rotate the M.2 drive down until the notch
Step 3. Slide the retainer forward (toward the connector) to secure the M.2 drive into place.
Attention: When sliding the retainer forward, ensure that the two nubs
small holes
4
Step 4. Align the blue plastic supports at each end of the M.2 backplane with the guide pins on the system
board. Then, insert the M.2 backplane into the M.2 slot on the system board and press it down to
fully seat it.
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on the M.2 backplane. Once they enter the holes, you will hear a soft "click" sound.
catches on the lip of the retainer
1
.
2
on the retainer enter the
3