Exhaust Problem

[enoZlavir Lurker Find all posts View Profile Close enoZlavir]

So I like working on my car and when I read about something I can tinker with I get out and give it a go...

Well last night I went to remove the valve at the back of the muffler and while removing the cover I kind of snapped 4/6 screws off... Not happy.

But now I have this rattle I need to fix, any suggestions? Also what should I be worried about and not do while it isn't sealed up down there?

Thanks for any help!