Waterproof cap for AMP SuperSeal 4P Connector

AMP Superseal connectors are used in different cars and can also be used outside of automotive business to make waterproof cable connections.

The only downside: If you have a unconnected cable hanging around the contacts can get wet and dirty leading to potential problems after reconnecting it.
Because there is no solution from the supplier, I made one for the 4-pole connector.