Sun Microsystems SPARC Enterprise T5120 Installation And Service Manual page 57

If you are installing more than one External I/O Expansion Unit, install them
■
together. Do not install a shorter subassembly between External I/O Expansion
Unit where the rear of the shorter subassembly might difficult to reach.
If the rack is marked with rack units, place the mounting bracket so that the lower
■
screw hole on the bracket is one hole above an RU mark (
the mounting bracket with the lower RU mark.
Typical Rack Unit Marks
FIGURE 2-2
3. Using No. 2 Phillips screws, attach the chassis lock brackets to the sides of the
External I/O Expansion Unit ( ).
FIGURE 2-3
Chapter 2 Installing the External I/O Expansion Unit in a Rack
). This aligns
FIGURE 2-2
2-3