HP 98568A Installation Instruction page 259

Note
HP 7933/7935 Disk Drives
If the interface already has several cables connected to it,
connect your HP 7933/35 cable to one of the other devices on
the interface.
5. Connect the Power Cord.
Connect the female end of the power cord to the power socket on the back
of the disk drive, and connect the other end to your power outlet.
6. Record the Address.
Make a note that address 0 (or the alternate address you set in an earlier
step in this installation procedure) has been used and is no longer available
on the interface you selected. Use the "Address Record" form on the
Chapter 6, "Mass Storage" tab for this purpose.
Adding Mass Storage Devices 6-33