FYI I just removed on of these. The second hidden allen key screw was deep inside the front hole (only accessible if unlocked).
I needed a very long Allen key to reach the screw. I threaded Allen key through a hole
In the latch (when unlocked). Once I unscrewed the hidden Allen key screw, the padlock sprang apart and split into 2 pieces so could be removed from gate.
Leaving this comment here in case anyone else needs to remove one!