Looks like the nozzle is similar to a windshield squirter and I wouldn't think that it would be difficult to route the windshield washer to the headlights, maybe even using a separate relay and switch so the two washers aren't fed at the same time - one bottle, one pump, two outputs.
But a headlight washer isn't much use without a headlight wiper and I'm not seeing one on the screenshots enclosed here.
It would be more useful to post a link to the part source rather than screenshots. That way someone trying to help you could go explore and maybe find other related pieces on seemingly unrelated pages.
looking thru pics i had... found several with the nozzle... all either sweden or finland... very much like the 70series headlight nozzles
I dont think i have any factory literature from either area specifically in the range of 80'-84' as these appear in that range for Eu all LHD .... all BJ.... 42/45/46
They look identical to the ones on most FJ60's (USA spec). The reservoir looks different but the pump, one-way valves and nozzles look the same. I bet the parts numbers cross over.
I thought about trying to retrofit a set of headlight washers of a MB G500, but they are too bulky. I like they provide a blast of clean water, unlike windshield washer jets, which is more of a stream.
I can't say that I ever noticed a huge benefit of the ones on my FJ60. There was a few times where winter mag slush was nice to cut off with the washers. Heavy mud was not easily washed off though with the washers. My biggest complaint with the headlight washers on an FJ60 is that they can only be sprayed while activating the windshield washers when the headlights are on. I found on countless occasions in the summer at dusk, or after dark I needed to constantly clean small bugs from the windshield, but the headlights did not need cleaned. Unfortunately you can't deactivate the headlight washers. Despite them using separate tanks, and the headlight tank is sizable, I always worried about running the headlight tank dry and burning up the pump because the larger more powerful pump uses at least twice the volume of fluid as the windshield pump. You start a long trip with both tanks full, but if you had to squirt a lot, the headlight tank will be almost empty while plenty is still in the windshield tank. I would have much preferred a separate dedicated control or toggle switch between the two functions.
A hotshot add on would be neat on headlight washers now, and I would run dedicated tanks and switches if I were to add it to a vehicle. I don't see why a set of FJ60 squirters couldn't be used, only us Mud snobs would notice you didn't have the rare OE nozzles.