Acer Altos R310 - Manual (Page 104)

Appendix B: Rack installation 94
b Hold down the latch (1) then slip the inner rail out (2).
c Repeat this procedure with the other rack bracket.
2 Attach the inner rails to both sides of the server.
a Align the inner rails to the three screw holes located on either
side of the server.
b Secure the rails to the server using #8-32 x 0.25 inch screws.
3 After attaching the inner rails to the server, put the server aside
and install the server mounting rails to the server rack.
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