BMW owners please help!?

I tried to get my car inspected and they said they can't find the "wheel locks" anywhere. I found two little things but I think they're just extra lug nuts. I have googled and done everything to try to figure out what this thing(s) are supposed to look like and I can't figure it out. Could someone please direct me to a picture so I can know what I'm looking for? Thanks so much!!! P.S. it's an '04 330i in case that helps. :-)