Acer Altos G300 Series User Manual page 159

9 Extend the middle sliding piece of each mounting rail forward
until it clicks.
10 Install the server tray into the rack by first carefully aligning the
inner rails attached to the tray with the mounting rails on the rack.
(1) Press the release latch on both sides of the server tray.
(2) Slide the server tray into the rack then push the tray into the
rack until it clicks.
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