Use Reiko, select Free Play, City Park, Par 3s, Amateur Difficulty to get the setup in this video. If you miss, exit round and restart with these settings. Aim a bit further up to counter the elevation, then adjust for wind; you want to shoot so you'd normally end just shy of the hole. The magnet will pull it in from there. If you overshoot, it's still possible for the magnet to pull it back, so wait until the ball stops to reload.
Confirmed from Psycho0022, this will also unlock the following achievements.