As for mounting the lamps themselves and running them as just headlights, there is no modification needed for the wiring harness.
However, I'm under the impression that that all of these have separate wires for the halo which lets you choose your function. Either as running lights, as turn signals, or both.
Since there is no interface harness supplied (that I'm aware of anyway) then the halo function is not plug-n-play, but would need some minor modification to that circuit.
What did you have to do to get yours working justafordguy? And are you running them as turn signals or running lamps? Or at all?
Thanks
Paul