Will these mount to the factory fog light buckets?

Yes. These bolt directly to OEM mounting points with no drilling or bracket fabrication. Factory holes line up with the assembly.

Do I need to splice the wiring, or is it a plug-and-play setup?

The harness is pre-terminated. You'll run it to the integrated switch and connect power and ground — no cutting factory wiring required.

Can I control these independently from the main headlights?

Yes. The included switch allows you to run the fog lights on or off separately from your headlight circuit.