Hey bought this mogul socket from ace hardware and got a standard cord from Walmart that has a male end and two wires coming out the other side one is the hot wire other neutral. There are 3 screw on the back of the socket tried winding the wire s on the brass and silver screw both ways and nothing turned on. I'm asuuming the 3rd smaller screw is just a ground but my cord doesn't have a ground. Any ideas how to work this??