In order for light conductor pins (6) in dead hole channels (5) of a plastic cover not to be melted together at their entire side walls with the cover they are produced through a particular injection molding tool in the same tool as the cover and the tool slide (104) which is a component of the injection molding tool (100) is aligned in the injection molding tool (100) with the dead hole channels (5) and inserted into the dead hole channels. The front plate is integrally molded with the base component before or after the light conductor pins are inserted into the base component. When the integral molding is performed after inserting the light conductor pins (6) the integral molding is also provided e.g. at a face of the inserted light conductor pins (6).