The problem here is that the plug/socket setup is reversed, normally a socket (supply side so no exposed pins) is the piece attached to a wall etc and the plug is the trailing part but when connecting to EHU the trailing lead is the supply, you can get what we refer to as an appliance connector which is a shielded outlet (what we fit to generator in work) but have never seen a plug that has any fixing points on it (to secure to vehicle) and that plug also need to be waterproof/splashproof dependant on fitting location ??????????