Asus RS260-E4/RX8 - Manual (Page 63)

ASUS RS260-E4/RX8 3-5
8. Position the rack rail to the 2U
space on the rack. Make sure that
the front end of the rack rail goes to
the front of the rack space.
9. Secure the front end of the rail with
two rack screws.
10. Secure the rear end of the rail with
two rack screws.
11. Repeat steps 5 to 9 to assemble
and attach the second rack rail.