Dell Precision 7820 Tower - Before Working Inside Computer; After Working Inside Computer

11 Align the screw holes on the rack ears with the screw holes on the rails on the top and bottom of the system.
12 Fasten the 4 (M3.5x8.4) screws on the top and bottom of the system to secure the rack ears to the system.
13 Install the system in the rack.
14
Rack rails