A great bird bath design by Nebojsa that I modified in Orca slicer to go on any flat surface with 2 clips to secure it in windy conditions, the original was designed for a balcony shelf or similar, so it had a lip on the bottom front edge. Using Orca slicer, I cut the lip off the front, then added 2 primitives (cubes) 2mm high as tabs, then made 2 clips with primitives.

Edit: I since found the outlet hole is nowhere near big enough, so see if you can make it bigger (double the size) before printing.