I have a Dell Dimension 4100, 256MB, 60G HD. I have just gotten broadband and need to get the Ethernet card installed. The cable company provided me with a card, DTNet Technologies Ethernet Network Adapter. No instructions were included. I have installed the board, attached the provided wire to the ethernet board, but can't figure out where the other end of that cable fits onto my computer. It's about 10 inches long, twisted red, green and black wires. The end that is left, has a 3 hole female plug end. HELP! Where does this go?