Anyone tell me what these are and where they go?

When I bought my E90 M3 I was given a couple of threaded pins by the previous owner. He said they were "pinion pins" and that he took them out to help handling when he autocrossed.

I would like to put the pins back in their rightful place, but a search on "pinion pins" didn't turn up anything useful to tell me where they go and how to put them back. I would really appreciate guidance from anyone that can point me in the right direction.

http://www.e90post.com/forums/showthread.php?t=519388

You'll probably find more with more googling - that's the first thing that came up searching "BMW 92 pinion pins".

Thanks! I searched BMW E90 pinion pins and came up with nothing useful.

err - typo, the search was E92, but anyway - glad an answer was easily at hand