To use an odd shutter less lens on a medium format camera you need a focal plane shutter and a way to focus it. What people do with the focal plane blad is usually have some kind of tubular sliding focusing rig built for the lens. That's the nice thing about the SL66, you've got a bellows for focus. You can find adapter plates on ebay, there's one made by a guy in china. I had mine made from an "official" Rollei SL66 lens mount blank, you can still find these on ebay but they are usually expensive.
The lens needs to be at least ~102mm or so to focus at infinity. You can use a standard SL66 extension tube if you need extra bellows draw, can also use these as the basis of a lens mount.