Hey,
I was just about to get the M washed and I saw your post, so I took a few photos for you. There are no holes but the 2 screw holes (white) for the plate bracket on the entire rear. the two dark squares in the photos are just "clean" spots haha. I took a photo of my holder too, maybe its somehow different then yours?
i havent had any water in the lights either. ( 2010 or 2011 )
anyway hope that helps and good luck...
