Dell PowerVault LTO3-060 - Manual (Page 14)

If your system does not use mounting hardware, check that the holes in the chassis are aligned with the holes in the side of the tape drive see Figure 7.
Figure 7. Mounting Holes on Tape Drive
1. M-3 mounting screw holes
Do not secure the drive with screws at this point because you may have to move the drive to get the cables in place.
Step 7 — Attaching Power and SCSI Cables
Attach a spare power cable from the system's internal power supply to the power connector, as shown in Figure 8 , number 1.
Attach a spare SCSI cable on the system's SCSI ribbon cable to the SCSI connector, as shown on Figure 8 , number 2.
Figure 8. Attach Power and SCSI Cables
NOTE: If the drive is the last device on the SCSI chain, it must be terminated.