Easy, the padlock used is a master lock type. By removing the bar from the lock (which easily fits through the neck in any direction) you can insert the mechani

Easy, the padlock used is a master lock type. By removing the bar from the lock (which easily fits through the neck in any direction) you can insert the mechanism half of the lock sideways (where it is narrow enough to fit through) and then you reassemble the lock inside. It's certainly not easy to do, but it is do able.