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Connector pinout: USB motheboard internal connector pinout USB motheboard internal connector pinout for most motherboards 10 pin IDC male connector at the motheboard (may be varied) pin name direction description color 1 Vcc +5V for USB port 1 2 Data0- for USB port 1 3 Data0+ for USB port 1 4 GND for USB port 1 5 keyed 6 Vcc +5V for USB port 2 7 Data1- for USB port 2 8 Data1+ for USB port 2 9 GND for USB port 2 10 N/C for USB port 2