A bicycle frame member (102c) includes a wire support (13) fixed thereto and formed as a bracket or coupler to receive and retain an electrical wire unit (EW2, 11a). An apparatus (15) is used to at least partially cover the wire support (13) and comprises a wire support cover member (15b) that is integrally formed with a locking unit (15f). The wire support cover member (15b) is to be placed onto the frame member and over the wire support (13) and the locking unit is to become locked to one of the wire support (13) and the electrical wire unit (EW2, 11a). The electrical wire unit may include electrical wiring (EW2) and a rigid cover member (11a).