gearbox mount positioning

On the 360, the gearbox has an arrow for the upside placement direction. With the 430, there is no arrow or indicator. The center metal piece on the 430 mount is oblong rather than circular as the 360. Is there a specific orientation for this mount? I did look through the site and there are pictures but no definitive answer that I could find. Just as easy to put in right as wrong. Part number is 237531 for the mount in question.