I purchased a Dell computer for a friend who is not a computer guy and I am setting it up. The Dell Monitor has built in USB ports on the side and back. What type of cable do I need to hook these USB ports up? Normally I would think it would be a cable with two USB male ends. However on the back of the monitor I also see a little square port. Like the kind that would be on the back of a printer. Is this the type of cable I need, a USB printer cable?