Headlight: Grouding Question, need help ASAP doing it now

[Banana]

I'm just about to begin my swap out headlight project, looked under the hood trying to find where/how they grounded the headlights but didn't see it. Can someone please explain to me how this process works? Also, did you have to take out the air filter to reach that lower screw on the drivers side headlight? TIA

[Zulu95]

Screw: No need to remove filter.
I ran ground wires from the nearest ground screw on each side when I did it. There are some up near the firewall on the suspension turret on each side.