Do you guys know the name for the component from a car I describe as below: It looks like a plastic USB with two part(green and black) connected with a clear plastic bar, and you can tell there is a iron needle like thing in the middle part of the plastic bar, and the black part has two holes. Someone told me the name before but I forgot it, maybe it comes with first letter "c", I really need help to find the name now, pls... thanks a lot!