Maybe this will help. It is a picture of what could be used as a boom bail, assuming your boom extrusion has a bolt-rope track in it. The eyestrap is screwed into a short piece of round stock. The dyneema loop passes through the eye and goes around the boom. You slide the round stock to the desired location and then tighten the screws. That binds the eyestrap in place. If you use the right length screws (or cut them down), then they won't bite into the boom.

That is kind of nice, because you can adjust the location of the bail to give the right amount of forward pressure and you don't put any holes in the boom. If you run any internal lines, there won't be any sharp objects in their way.