Little update about my problem. If ecer there comes a time when someone else is struggeling with the same thing. Anyways, I went to my local BMW dealer and what they did find was that this plate that connects the top box to the frame, it wasnt available as a spare part from BMW. It should come...
Went there yesterday and the Parts person was on his computer for 45 minutes and the best he could come up with was that it maybe should come with the plastic top case bottom part, but mine did not, it was only the plastic frame that i got... and now this is the only part that i am missing, my...