Acer Altos G510 series User Manual page 123

(3) Gently twist and pull the stands from the server.
The Rack Mount Kit contains two sets of rack brackets and mounting
rails. The rack brackets attach the mounting rails to the server. Each
bracket is composed of three pieces: a detachable inner rail and a fixed
middle and outer rails. The mounting rails hold the server in the
brackets and allow the system to slide in and out of the rack for
maintenance or upgrading purposes.
4 Remove the inner rail from the rack brackets.
(1) Extend the inner rail until the rail release latch clicks.
(2) Press the release latch then slip the inner rail out.
113