On my GC there is a second set of braces that form a diamond shape with the two described in this thread. It looks like from the pic below that there is the same mounting point (the upside down flat pyramid at the top of the pic). I wonder for those without the second set of braces if these would also help. Here is the link to what I am talking about
http://www.realoem.com/bmw/enUS/show...diagId=51_8755, items 1 and 2.