Does the S have 2 or 4 mounting points for the rear license plate? The pictures I have noted so far show only 2 screws at the top edge. However, it could be that there are 2 lower mounting points which are simply disregarded or rendered unusable by a license plate frame with a solid bottom bar. I would also appreciate information regarding mounting hardware. Will standard bolts (metal or plastic) sold as packages in car supply stores suffice? Or does one have to pick out a set "a la carte" from the hardware bins at Home Depot or Lowes? Thanks in advance for your answers. They will help me design a custom license plate frame.