i have to replace the dc jack on a sony vaio nw series notebook. the part i ordered has 2 black ground wires, but the part inside it has one black ground wire. they have the same exact part number. they have a loop at the end that screws into the metal frame. can i screw both ground wires into the place where the one ground wire went to or do i leave it off? do i cap it? what do i do with that second wire?