Orient the parts so that the flanges on the slide and the bracket face in opposite directions.
The type of fans in the switch determine whether you choose the front or the rear of the rack or cabinet as the attachment point. This choice is particularly critical if you are installing the switch in a closed cabinet.
See Power Supplies and Fans for descriptions of forward and reverse fans.
Use M6x12 mm or No. 10-32/1/2” screws as appropriate for the rack.
If the rack does not have threaded holes, install M6 cage nuts in the rack rails.
See Attach Power Cords.