Does anyone now what this switch is for?ishttps://photos.google.com/photo/Ahttps://photos.google.com/photo/AF1QipNYRRF3RMUsYx_gtt5DVPCQsUUsl0QjU3OvcwWPF1QipNZCj12IwroqUxUylsKEW5A2v_8HGd5en7EqxWw