Asus RS162-E4/RX4 - Manual (Page 64)

Chapter 3: Installation options -
3.4 Rackmounting the server
To mount the server to the rack:
1. Firmly hold the server on both sides and insert the rear panel side to
the front end of the rack rail, then carefully push the server all the way
to the back until the front panel fits the front end of the rack, and the
rack screws on the server match the middle hole on the rack.
2. Tighten the two rack screws to
secure the server to the rack.
Rack screw