Will these bolt straight to my factory mounting points?

Yes. These mount at your vehicle's existing fog light anchor points — no drilling, brackets, or adapters needed. Test-fit before final tightening to confirm fitment with any bumper add-ons you may have installed.

Does the switch wiring run through the engine bay or inside the cabin?

Routing method not specified. Plan on running wire through your existing harness conduit or drilling a small firewall pass-through if one doesn't already exist. Your vehicle's service manual will show you the cleanest path.

Do I need to wire these to a relay, or can they run straight off a battery?

Relay requirement depends on your vehicle's electrical draw limits and existing wiring capacity. Consult your service manual before finalizing the switch connection — oversizing without a relay can trip circuits or blow fuses.