I decided to check with the man who would know best - Robert Newton himself. I emailed him through a link at his website. He asked me a question or two, emailed me a picture, and after some trial and error, I've figured it out. There quite a few places on the bracket that a hex key can be used for set up and adjustment. Its was a little confusing at first, but now I see the logic in how the bracket was designed. Very clever actually.

Anyhow, thanks for taking the time to reply.