headlight jets only work when headlights are on, car doesn't have to be moving, just headlights and ignition on and wash the windscreen and hey presto the headlight washers go off as well (at least they do on my car!)
UB7RN The winter pack headlight washers come with the low fluid warning lamp so I suggest you can find the relavnt parts easily enough in EKTA and retrofit, don't know if the car will then need coding to recognise them or not?