1pc USB Expansion Cable USB 9Pin Female to Dual 9P Male 1 to 2 Extender Y Splitter Adapter Cable 10cm for Computer Motherboard

Note: There are individual motherboard designs that will have insufficient power to recognize only one interface, but this is not common. 

Strictly according to the standard USB definition wiring, there is an anti-plug design, as long as the hole is correctly positioned when inserted, and plugged in, is available. (There is a plugged hole design, so it will not fit in if plugged in incorrectly)