That looks good rnr.
If you were to raise the rear mount a little and drop the front a smidgen the mounts would fit the tubes a wee bit better. If possible, you want the rear mount pretty much fully against the seat post. The front should come down by itself.
Support the bottom of the motor then loosen the front a good bit. Loosen the rear and fit the mount square against the seat tube - you might need to just rotate the motor forward just a bit. Try to get as much of the gap out of the mounts where they fit up against the tubes. It's almost hunk dory as it is.
After you do all that (if you do) you might want to cut off the extra stud lengths.
You gonna name it? I think I'm gonna name mine "cHarley".
Ted