"Magic Locker" emergency key safe

The "Magic Locker" (basically furniture locks) are used in recent chastity devices both the cheap metal ones found on places like Aliexpress as well as the Holy Trainer device. They are usually supplied with two keys.

The idea of this key safe is that you can keep a key with you for emergency use but your keyholder can check to make sure you've not used it. Simply insert the spare key and use one of the plastic locks (or a combination or timer lock) through the hole.

I've supplied the Op