Lenovo ThinkSystem SR550 Setup Manual page 80

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
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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.
Figure 46. M.2 backplane installation
For server models with twelve 3.5-inch hot-swap drives, if you are installing the 480 GB M.2 drive, install the
M.2 drive air baffle for proper airflow.
ThinkSystem SR550 Setup Guide
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on the M.2 backplane. Once they enter the holes, you will hear a soft "click" sound.
on the retainer enter the
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