For the rear no. I made the holes in a straight line with the holes on the sides. In the middle I fit it with two zipties 5cm apart.
But you can of course just make extra holes on the original and it will be the same. I had it like that on my other bike.
Normal size but it's "home made" from a plastic sheet. I made the holes in-line to fit it to the cross section of the rear triangle. (Sorry I don't speak German.)
But you can of course just make extra holes on the original and it will be the same. I had it like that on my other bike.