Hmm, yeah I think I’m with Paul on this one - probably for headlamp wipers. The wipers had a washer as well, so you’d need to power each wiper motor plus a washer spray pump...I have not seen that on a recent (post 86) 240, however the later sedans do seem to have an extra connector down near the windscreen washer bottle for the wagon rear wiper spray pump that was located in the front on later cars.