Acer AT310 F1 - Manual (Page 130)

Appendix B Rack mount configuration 112
Installing the system into the rack
Caution! To minimize the chances of injuries, make sure that two
or more people help in installing the server.
1 Confirm that the left and right inner rails have been correctly
identified.
2 Attach the inner rails to both sides of the server.
(1) Align the screw holes on the rack handles with those on the
server and use the screws from the rack mount kit to secure
the rack handles to the server.
(2) Align the screw holes on the left and right front inner rails
and use the screws from the rack mount kit to secure both
rails to the server.