I also use the bullet connectors with the rubber coated sleeves that the rest of the car uses. It is a pain to take the headlamp apart to disconnect, and if your car was not a show car, you could make the connections at the point where the wires go through the radiator shell, between the shell and the radiator.
I use a short piece of rubber hose, like fuel hose to insulate the wires from the metal ferrel on the headlamp. All this requires destroying the original type connector, but that does not bother me to destroy a repro part.