H7-A has a blue insulator over the wire going to the front of the bulb on the lower side of the bulb. H7-B has a brown insulator over the wire going to the front of the bulb on the upper side of the bulb. (as pictured) One is designed for the low beam housing the other is designed for the high beam housing. You need the proper bulb in the proper housing to eliminate the shadow on the road. Simple as that! No need to file tabs off just buy the correct bulb for intended placement.