Basic install for H4 headlights?

I just recently got my headlights from the mail and there H4 7x6" headlights with halo and something called a city light. The H4 bulb has three prongs on which I don't have the slightest clue on how to wire them lol. And for the halo effect, its pretty much wiring them to a on/off switch correct? Is there anyway to wire the city light "I think its pretty much a daytime running light now thinking about it", along with the second lighting setting; the setting before the headlights being fully on? I'm a noob, don't mind the odd questions.. Thanks yet again for any advice..



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Just unplug your factory headlight and plug in the new ones,I think the city light wires in to parking light.

Got the same for my 1985 300D ; They do light better than seal beams !