Mount front plates without drilling holes
I just installed the front number plates without drilling holes. I used the original mount that came with my BMW. I used a couple of 24" long cable ties (1/8 " wide), looped them through the bottom holes (not the holes for the screws), and tied them to the back grill. The mount is held in place by 2 hooks at the top. Then I screwed the plates on to the mount by 4 screws.
Job done in 10 minutes.