BigAndy: Good idea to mount driving lights, yes, they are needed!
IMO, set them apart closer to the dummies(fog lights), a wider pattern makes a better pattern and is not so "pencil beam".
From the plastic grill, next to the headlights(in between the grill and the headlights), you should be able to access the metal to the radiator mount, that is where I would possibly mount mine..., that is a firm place and NO/less road vibration(shaking).
Let us know how it goes...