Step 3.  Install the security bezel to the chassis. 
Figure 97. Security bezel installation
a.  Insert the tab on the security bezel into the slot on the right rack latch.
b. 
Press and hold the blue release latch.
c. 
Rotate the security bezel inward until the left side clicks into place.
Step 4.  Use the key to lock the security bezel to the closed position. 
Figure 98. Locking the security bezel
After you finish
Complete the parts replacement. See “Complete the parts replacement” on page 154.
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ThinkSystem SR645 V3 User Guide