2003 Nissan Altima Custom Headlights

For starters with the price i paid for these headlights they should come already adjusted since they are supposed to be vehicle specific.. Also i was under the impression that i wouldn't need a power inverter for the LED lights to work but i actually do, now i am stuck with these headlights that, while they look great, only half work. And can't afford a power inverter either. They are bright but really wasn't what i was expecting for the price i paid. Instructions are too vague, dont really give much detail into how to properly install them, it says locate the power inverter but doesnt state where you can actually find it. Again its vehicle specific so a simple picture showing its location would be greatly helpful. But since the description of the lights said i wouldn't need one when i bought them I'm stuck without one and no way to wire up the LED part of the lights.