That's interesting, because the security cable and power cable are clearly bundled together as they come out of the display table and run to the left side of the machine. I can't see where the security cable swings around to the right side of the machine to plug into the USB port.
all the pics from the stores have white things on the usb ports. i'm guessing they secured the cable under or round the back of the machine to stop accidental unplugging.