What markings, if any, are on the reverse side?
It looks like a floppy plug but it has five points on the block not four, the floopy one is called a Berg connector soemtimes,
whats it from, and can we get a better picture?
The black end is a usb header for a mother board. the cable is used to connect a bluetooth or other small pci boards from the port on the board to a usb header port on the motherboard.
for example: but that has the white port on both ends. http://www.ebay.com/itm/5188-7146-HP-Compaq-Wireless-Us...