Stupid Question, Alien Bee Softbox Connection to Canon 580EX II

[TooManyHobbies]

I've used my AB softboxes on my strobe lights and my flash with umbrellas, but what do I need to get to use my flash with a softbox? Some kind of ring to flash shoe adapter with swivel?

I know stupid question. I wonder why I didn't do this before.

[TooManyHobbies]

Thanks, just what I needed.