USB lead does not connect to the topside box


Hi all, The topside connection box has a sort of mini USB socket which is narrower on the bottom edge than the top. The USB lead supplied has a rectangular white plastic plug with 5 channels, 4 of which have a wire connected. The plug definitely does not fit the socket so I am stuck. It seems a very simple problem! Do I have the wrong USB lead? The topside box looks like the photos in the guide but I can’t find a photo of the white plug.