Here is a simple How-To when it comes to installing BFxenon Plug and Play HID Headlights or Fog Lights.
Here you see a straight forward plug and play setup for any single beam vehicle. The only time this will vary is when it comes to vehicles that need an anti-flicker kit, like Dodge, Jeep, and Chrysler vehicles.
If you have one of these vehicles, the anti-flicker kit will go right between the plug from the factory and the ballast.