Not familiar with that box or that car, but the easiest way to do it is to yank your Buggy body off, and lay it (the Buggy not the body) on top of the starter box. Then line up the flywheel with the starter box wheel and see where the edges of your chassis extend to on the box. Mark the 4 corners somehow, or just do one post at time, and add the chassis posts that came with the starter box close to your marks, but don't fully tighten them. Once you have the posts on the starterbox...put the buggy back on and line up the flywheel with the starterbox wheel again, and then adjust and tighten down the starter box posts so that they are snug against your chassis. Once you are done, check your flywheel to make sure it's lined up properly. If it's not..make minor adjustments until it is.
Pretty simple, but it does take a little bit of time the first time you do it.
Hope that helps....if you take the time to get it perfectly aligned....you will have MUCH easier starting.
