Lenovo ThinkSystem SR645 V3 User Manual page 63

Step 5. (Optional) Secure the server to the rack.
a. Install one M6 screw to each of the rails to secure the server to the rear of the rack.
Rack rear
Figure 24. Securing the server to the rear of the rack
b. Secure the server to the front of the rack. Fasten the two thumbscrews located on the front of
the server.
.
Chapter 5 Hardware replacement procedures
53