Fujitsu Sparc Enterprise T5120 Installation Manual page 51

Inserting the CMA Rail Extension Into the Rear of the Left Slide Rail (Either Server)
FIGURE:
The right sides of the two CMA arms have hinged extensions. On the
manufacturer's instruction sheet, the smaller extension is called the CMA
Connector for Inner Member. This extension attaches to the right mounting
bracket. The larger extension is called the CMA Connector for Outer Member, and
attaches to the right sliding rail.
3. Insert the smaller extension into the clip located at the end of the mounting
bracket.
Slide the smaller extension into the square hole on the middle-in-width of the clip
that is located at the end of the mounting bracket.
Installing the SPARC Enterprise T5120 and T5220 Servers 29