You make it up. If someone says "That's not the way it goes," then tell that person it's an arrangement.
I play "Forever and Ever Amen", but I don't have a recording of it, and I didn't remember exactly how it went from fifteen or so years ago when it was popular. So I was playing it at a campfire one time when a very talented singer friend of mine asked, "Do you want to hear how Randy did it?" I liked that. He didn't say, "You did it wrong," or "That's not how it goes", or pass any kind of judgment. He just offered to let me hear how the original singing artist performed it, which offer I gratefully took him up on.
- Zurf
Granted B chord amnesty by King of the Mutants (Long live the king).
If it comes from the heart and you add a few beers... it'll be awesome! - Mekidsmom
When in doubt ... hats. - B.G. Dude