Connection system

A connection system for electrically connecting a cable to a device connector, the connection system comprising:

• a terminal lug comprising a connecting section having an opening open or closed at an edge of the opening and configured to bring the terminal lug into a connected state in engagement with the device connector;
• a fixation element configured to fix the terminal lug in place in the connected state on the device connector with at least one of a shape fit and a force fit to produce a fixed state;
• and
• an elastomer overmold overmolded onto the terminal lug at least in a region of the connecting section to form a holder having a wall arranged on the connecting section and extending from a top side of the connecting section in a normal direction to a plane of the opening with a closed circumference;
• wherein the fixation element forms a section of a locking unit arranged at least in sections within the holder in the fixed state and comprising a cap element configured to cover at least sections of the fixation element;
• and
• wherein the cap element is configured to press against and elastically deform at least sections of the wall in the fixed state to achieve a seal between the wall and the cap element.