HP 638814-001 SATA data cable connects a SATA optical drive to the system board in supported desktop configurations. It is a drive data cable intended for the optical drive connection.
One end is straight and the other is angled, giving the cable two different connector orientations for routing inside the computer. Its listed length is 25 inches (635 mm).
This part is identified in HP's service documentation as a drive cable for connecting a SATA optical drive to the system board.