[mike_newcomb]

Hi Peter, those fixings were originally called Frig Rivets, as they first appeared to hold in place the plastic mouldings inside refrigerator doors etc.

Just push the centre pin in, until it falls out inside the charger. (when the charger is open, retrieve for reuse). The rivet body should then gently ease out upwards. When you reuse the pin, one end may be tapered for insertion.

In the unlikely event any rivets break, they should be easily obtainable as they tend to be standard sizes.

Regards - Mike