Asus RS320Q-E7/RS12 - Manual (Page 45)

3-3 ASUS RS320Q-E7/RS12
4. Select a 1U space on the rack where
you want to install the rack rail. A
1U space consists of three square
mounting holes with two thin lips on
the top and the bottom.
5. Adjust the rack rail to fit the depth of
the rack.
7. Secure the front and rear ends of the rail
with two rack screws and washers.
8. Repeat steps 4 to 7 to attach the rack rail
on the other side of the rack.
6. From inside the rack, place the rear rail
hook on the bottom thin lip of the rear
mounting hole, and place the front rail hook
on the bottom thin lip of the front mounting
hole.