Windscreen or headlamp washing system

Hello municipality, it’s me again. My problem today revolves around the (apparently not so widespread) headlight washing system. Do I have to dismantle the fender in order to get to the pump for it? Because, in my attempt to get that way, it didn’t work. I don’t know if the previous owner has been there before, fact is anyway, I have the nozzles in the bumper, from these also hoses go into the wheel box. From the other side, than from the inside, comes also a wire harness, with plug, probably the control line. On the tank itself I find, if I reach under the wheelhouse cover, only a float, which triggers the warning light at too low a level but I find no pump, especially because hoses and cables are even loosely under the cover. Since I do not know now exactly where the pump should sit, keep my question, whether I have to come up with this or whether the fender has to come down for it. By the way, the whole is on the left side, so that the Over from the windscreen washing system, just for information Maybe someone can help me. Thanks already. Lg, Jörg