To help out some more... I took pictures of where and how I have my Resistors mounted. Basically, I bit the bullet and used a couple of self tapping/drilling screws from Home Deport to mount them to the chassis - it's also the perfect spot to ground them (I scraped the paint a bit to expose the bare metal under the resistor)...
Driver Side -
Passenger Side -
Driver Side again with Headlight Housing over it -