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Amazon.com: zdyCGTime 8-Inch 4 Pin Floppy Drive to 15 Pin SATA Male Power Cable(2-Pack) : Electronics
4-pin Floppy Male Power Connector To 15-pin Sata Female Power Cable Adapter - Walmart.com
SATA til Molex and 4 pin power adapter
Source IDE power to floppy drive power cord Big 4Pin to small 4Pin power cord on m.alibaba.com
Is this a floppy disk connector to the power supply? - Super User