I want to wire up some secondary fog lights behind the lower grill in my hatchback. I want to put in a toggle switch and run the lights independently of the stock fogs. I know how I want to mount them but I have not idea how to wire them. I know how to get the wires from the engine bay to the cabin, however I just don't know what I need to tap into for the power to the lights. Also, I have not picked out the lights yet, will that matter? I was just going to get some medium sized round lights, nothing fancy.