Nowhere can I find an explanation of how to connect the ground end box to the ipad. My ipad has one and only one, mini usb port. The ground end has a power lead with connector on one end, and two bare ends on the other. So what do I do with the bare ends? http://www.dji.com/product/ipad-ground-station/video This video shows nothing about connecting anything to the ipad. Doing a little more searching I found this site very helpful. http://skypixel.org/post/83254735947 The last photo on the page shows the ground end connected to separate battery. So do I assume correctly then that the BTU acts as a wireless link to the ipad? What's the range on it?