Scott,
Here is a picture of the radiator skid plate. This picture shows the side of the plate that faces the radiator. Note the 4 bolt holes at the top and the two bolt holes at the bottom.
The picture below shows how the radiator skid plate attaches to the truck. The bottom of the skid plate fits between the calmini drop bracket and the original factory bracket. The two arrows show how the bolts attach the skid plate to the original factory bracket. These bolts are a little tricky to get at because the Calmini bracket limits access.
Let me know if this clears things up for you or not.