HP R12000 User Manual page 27

IMPORTANT:
pack kit.
To install the mounting rails for the 1U DirectFlow Battery Pack:
Loosen the wing nuts or hex nuts, and then extend the brackets to the desired length.
1.
For rack shipping or relocation, ensure hex nuts are used in the rail supports.
Install the screws through the rack into the mounting rail and the front of each mounting bracket.
2.
Mounting hardware for square- and round-holed racks is included in the battery
Installation 27