Spaghettidecoder.org...find the TIS for it. I haven't done it, but I'm pretty sure you won't get by with just sticking in the hole it slipped out of. I could be wrong, but kind of doubt it.
You did all that bushing work...seems like you'd sense that there's more to it than this.
If you can't find an answer, come back and I'll see if Bentley has something to say about it. And, btw, you should get Bentley...best part you could buy for your car.
Upcoming NYC dates: Jan 8 and 27. See Facebook for other shows and PM me if you can make one...love to see you there!
Mangofy your E46!