A connection device for an appliance with an appliance housing includes a main body having an appliance-side end, a connection-side end facing away from the appliance-side end, and a conduit extending from the appliance-side end to the connection-side end, a securing element securing the main body to a wall section of the appliance housing, and a conductor leading through the main body from the connection-side end to the appliance-side end. The main body has a first abutment surface facing the appliance-side end. The securing element has a second abutment surface facing the first abutment surface. The first abutment surface and the second abutment surface enclose therebetween a receiving region for clamping reception of the wall section of the appliance housing.