Do these mount directly to the factory location?

Yes, they bolt to factory mounting points — no drilling or bracket modification required. Use your existing hardware to secure the assemblies.

Are the LED DRLs a separate circuit or do they tie into existing wiring?

That wiring integration detail isn't specified in the product data. Consult your vehicle's service manual or a professional installer to confirm the harness compatibility before ordering.

Will these work as plug-and-play, or do I need an adapter?

Direct-fit means they align and mount at factory points, but the electrical connection — whether OEM plugs match or you need an adapter — depends on your specific vehicle. Test the connector before committing to full installation.