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.
These lights often have the highest illumination in the tail lamp assembly but not as bright as the head lights. The park light in the tail lamp assembly signals the drivers behind that there's a presence of another vehicle whenever it is dark, foggy or rainy weather. It is also used as a brake light. The park light usually has the highest part in the assembly which turns on as the driver steps on the brakes.