Use this S-ATA cable to convert the 4-pin HDD interface to the SATA power connector. This adapter is 100 mm with a 4-pin, 5.25 power connector on one side, 15-pin SATA power connector on the other and angled (90°).
Why would you choose this adapter?
The angle of the cable makes it the ideal solution where space is limited. A 90° angle makes it easier to connect an S-ATA drive avoiding strain on both cable and connector.