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.
Not only are there a ton of choices, but low voltage systems are very flexible, allowing you to mix and match different light types. You can use a combination of pathway lights, post lights, spot lights, up-lights, and even stair lighting all on the same transformer and circuit.