Cheers guys, yep...I've got 4 brackets, this is part of the problem. There is nowhere to attach the bottom two. I assume that there should be two holes in the bottom half. But ever if there were, I don't think that the socket head cap screws supplied would do a very good job with out some type of washer or insert to support them. Think I'm going to have to invent something and drill some new holes. I've got the booklet that came with the part, but it's not very useful.