Lenovo ThinkSystem ST50 V2 Maintenance Manual page 155

A video of this procedure is available at YouTube:
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Procedure
Step 1. (Optional) Install the cage bar.
a. Insert the tabs on cage bar to the slots on the rear side of the chassis.
b. Align the tabs on the other end of the cage bar to the slots on the front side of the chassis, and
rotate the cage bar toward the front of the chassis until the cage bar is secured in place.
Figure 117. Installing the cage bar
Step 2. Install the serve cover.
a. Align the server cover to the slots on the side of the chassis. Ensure that all the tabs on the
cover align are engaged with chassis properly; then, slide the cover towards the front bezel
until it snaps in place.
b. Use a screwdriver to fasten the two screws to secure the cover to the chassis.
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https://www.youtube.com/playlist?list=PLYV5R7hVcs-
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Chapter 3 Hardware replacement procedures
147