This power cable can be connected to a power supply via 15pin SATA connector. Thus you can supply power to 3 SATA hard disks and 1 IDE drive.
Power connector for 3x SATA HDD + 1x IDE drive
Connector: 15pin SATA > 3x SATA HDD + 1x 4pin IDE 51 col
Cable length: ca. 15cm
Delock poly bag