Sentry Owl mounting system.

We've been having serious squirrel problems so we purchased an Owl Sentry. No mounting system was provided so made these two items so that one could be placed on a horizontal surface and the other could be secured to the Owl (it has a hole in thew bottom of it). The item in the owl is open through the inside to allow for ballast if needed. The post mount is closed off so none of the ballast slips in.