Avago Technologies 3ware 9650SE-12ML - Manual (Page 38)

Chapter 3. Installing the Battery Backup Unit
34 3ware 9650SE Serial ATA RAID Controller Installation Guide
5 If you have a 4-port or 8-port 9650SE:
a Hook the clips on the top of the battery module over the
slots on the top edge of the controller.
Figure 27. Clips on the battery module hook over slots on
the top edge of the half-height controller
Figure 28. Attaching the battery module to the half-height
controller