It's surely not going to be plug and play.
The halogen system is looking for a single 2 filament bulb (3 wire connection at a single point), while from my own HID experience, I know that the High beam wiring for the LED assembly is totally separate.
It would be no big task for someone with rudimentary wiring experience to pull the hot for low beams and the hot for high-beams and split the negatives and make it look professional.
The LED pitch adjustment issue is interesting though.
I wonder what the no power default condition is?
Could you set the pitch in the OEM vehicle, and would it stay put after moving it over to a car with no connection?
My Audi goes through a very noticeable headlight adjustment sequence when you start the car at night, but I have never seen anything like that with the Leaf.
I think the Leaf's adjustment is purely passive unless you act on it to change the pitch.
I think if you set it, and remove the headlights, it would probably stay put.
Post about what you discover and some pictures of the adjustment mechanism if you decide to proceed.
Except to play with it when I purchased it, I have never ever adjusted beam pitch on the LED low beams.
How many "normal" cars let you remotely adjust headlight pitch?
My Porsche 928S did, but those headlight stowed (retracted).
Black SL Delivered 3/14/2012
7.2Kw Charging w/Brusa
JUKE 17" Wheel Upgrade w/225-45-17 Michelin MXM4 Tires
Infinity 63.9i Speaker Upgrade
WattsLeft Meter System
LED High Beams
Carkit NAV Override