To set up the speaker in the front door, attach the wire harness connector to the speaker, line up the speaker inside the door, drive the fastening screws, mount and trim the door panel and attach the battery negative cable last. First, hook up the wire harness connector of the instrument panel to the speaker, put the speaker where it belongs in the panel, fasten the speaker with the appropriate screws, fit the grille in place and wire the negative end of the battery to the speaker. On the rear door, attach the wire harness connector to the speaker, place the speaker in the door, install and tighten the fasteners, install the trim and finish up by connecting the negative cable from the battery.