Hi, i´ve been multitest the USB expansion board. the USB pinouts in the motherboard scheme (printed as USB2) is:
1-ground
2-ground
3-data1+
4-data1-
5-VCC
6-VCC
7-data2+
8-data2-
9-useless
10-doesn´t exists
the grounds and vcc are common for both ports. the 3 and 4 pins are for port1. the number 7 and 8 pins are for port2.
disculpen el mal inglés.
saludos y éxitos.
pd: this may help
http://pinouts.ru/Slots/USB_pinout.shtml