Print standing upright, with tree supports enabled for the lower overhang. All other overhangs should not need supports as they are angled 45 degrees or greater.
Mounting and Orientation:
I mounted mine using two horizontal 3M Command Strips as seen in the uploaded photo, leaving the tabs sticking out the back.
The primary STL model will mount as seen in the photo, with the mounting surface on the left and opening slot on the right. Use the "Mirror" feature in your slicer if you need a version facing the opposite direction.