Acer Altos R510 - Manual (Page 178)

Appendix B: Tool-less rail kit installation 166
The Multi-Pin Adapters allow the Slide Rails to be used in racks that
have square mounting holes or round mounting holes.
1.On each Slide Rail, reverse the Multi-Pin Adapter position to
match the rack mounting hole type if necessary. Remove the
Multi-Pin Adapter by rotating the Swivel Lock up, pressing the
mounting pins together, and then pulling the adapter from the
Multi-Pin Bracket.
2.Install the Multi-Pin Adapter by pressing the pins together while
inserting adapter into bracket. Multi-Pin Adapter must be fully
locked in bracket. Make certain both mounting pins on Multi-Pin
Adapter are fully engaged in Multi-Pin Bracket, then lock Multi-Pin
Adapter in place using the Swivel Lock.
3.Repeat the above steps for both ends of each Slide Rail.
Installing the Slide Rails into the Rack
1.At all four rack uprights, determine the vertical position in the
rack where the Slide Rails are to be installed. The top-most
mounting hole for a particular Rack Unit (RU) mounting position is