SUPER MICRO Computer 5010E, 5010H Installing the Server into the Rack:

Chapter 2: Server Installation
2-5
Figure 2-3. Installing the Server into a Rack
Installing the Server into the Rack:
You should now have rails attached to both the chassis and the rack
unit. The next step is to install the server into the chassis. Do this by
lining up the rear of the chassis rails with the front of the rack rails.
Slide the chassis rails into the rack rails, keeping the pressure even on
both sides (you may have to depress the locking tabs when inserting).
See Figure 2-3.
When the server has been pushed completely into the rack, you should
hear the locking tabs "click". Finish by inserting and tightening the
thumbscrews that hold the front of the server to the rack.
assembly securely to the rack using the brackets provided. Attach the
other assembly to the other side of the rack, making sure that both are at
the exact same height and with the rail guides facing inward.