Unbox the Western Digital Hard Drives
You have 3 Western Digital Black 2TB Performance Desktop Hard Disk Drives
Unbox them one at a time.
Wear your Anti-Static Wrist Strap before taking out the Hard Drives from the Anti-Static bag.
Top Face
This side faces up.
Bottom Face
Make a note of the 4 mounting holes on the bottom face.
Each hard drive has a 7-Pin SATA Data Port, and a 15-Pin SATA Power Port.
Do not touch these exposed pins!
Here is the view of the SATA Power and DATA Ports from the Top face.
Label your 3 Hard Drives as:
HD1
HD2
HD3
Place the Label on the back.
This will help you identify the Hard Drives while connecting the SATA Power and Data Cables from the back.
Here is how your 3 unboxed and labeled Hard Drives should look like.