Wiper spoiler attachment for 2003 530I????

Hi all. I'm new to this board and have a repair question (minor). The drivers side spoiler that holds the wiper blade broke on my 2003 530i. I purchased the part and can't seem to figure out how to attach it to the arm. I've lined it up just like the passenger side and there are holes on the arm which need to receive pegs on the spoiler. How does this attach specifically. I've tried to squeeze the spoiler into the holes to no avail. Is there a trick?

Thanks in advance,

Jeff