Though the degree of cooperation differs between alliances, airlines alliance is more helpful for small airlines. There are three major international airline alliances namely SkyTeam, Star Alliance and Oneworld. One of the modern alliances is that formed by cargo airlines.
The top terminal should be connected to wire #18 (low beam), the bottom right to wire #17 (high beam), and the bottom left to wire #91 (headlight to ground). I purchased my lights from a local shop, but I found that Susquehanna Motorsports has a web page with competitive prices and a nice write up about the lights.
How a Projector Headlight Works. A projector lamp is lit by a filament at one focus of an ellipsoidal reflector with a condenser lens in front of the lamp. Between the reflector and the lens there is a shade at the image plane. The projection of the top edge of the shade provides a low-beam cutoff.