Clamps to power cable adapter

This part is meant to be used as a replacement for a power adapter.

A battery charger with clamps can then be used as the power source.

The reason i made this was that i bought a cheap electric car for my son which arrived with a terrible power adapter for charging the batteries - it destroyed them slowly.
I owned an advanced battery charger that could maintain the batteries during long storage periods, which I wanted to use for charging the car.
But while wanting to use the charger for that purpose it should still be able to be used for other batteries, such as my bike etc. Therefore one of the criteria for this were that the clamps should be easily detachable.

If the holes in the wall are too narrow for your usage, just drill them out as I have to fit in a screw.