The right side of the drive is mostly black with white lettering displaying the product name, etc.
On the bottom of the enclosure are two large rubber feet.
Flip the wedge back down into position to secure the drive.

For thinner drives, the included foam pads can be used.
Once your drive is installed, simply replace the side panel and screw it back down.
The adapter card is an x1 PCIe card that features a black PCB.
The card draws power from a single 4-pin Molex connector.