Setting Up the System 2-9
A – M5 Cagenuts for Cable Retention Arm
B – Rack Mounting Bracket
Assembly Alignment Tabs
C – Rack Mounting Bracket
Assembly M5 Screw Holes
Figure 2-5. Locating and Marking the Rear Mounting Holes for the BSU
3. While marking the hole locations for the Rack Mounting Bracket
Assemblies and Cable Retention Arm, also mark the locations on the front
vertical mounting rails for the cage nuts, which hold the thumbscrews of the
BSU faceplate (see Figure 2-4).
4. Insert four M5 cage nuts in their marked locations on the front vertical
mounting rails (see Figure 2-6), as follows:
! Position the cage nut on the inside of the front vertical mounting rails.
! Hook the side lip of a cage nut into the square hole in the rail.
! Push the other side lip of the cage nut into the square hole in the rail
until it is secured.
! Repeat for each cage nut.