Specifications

Set the aluminum heatsink aside for now.
Place your hard drive mechanism onto the bridge card and fully seat the
drive onto the connector.
Turn the bridge over and look through the screw holes. Make sure they
are fully lined up and insert 4 screws into the hard drive.
OWC Mercury On-The-Go Pro Chapter 2 - System Setup
2 SYSTEM SETUP
2.1 Hard Drive Assembly & Installation (continued)