HP EliteBook 820 G1, HP EliteBook 725 G2, & EliteBook 720 G1 Notebook PCs - Maintenance and Service Guide

d. Remove the hard drive connector adapter (3) from the hard drive.
The hard drive bracket, hard drive connector adapter, and screws are available in the Hard Drive
Hardware Kit, spare part number 730539-001.
Reverse this procedure to reassemble and install the hard drive.
Component replacement procedures 73