Up Angled USB 3.0 A Type Dual Female to Motherboard 20Pin 19 Pin Box Header Slot Panel Mount Cable.
Up Angled USB 3.0 A Type Dual Female Assembly with usb 3.0 connector.
You can connect the 20pin header to the internal usb 3.0 motherboard,
Then connect the USB type A female to the external USB 3.0 device.