I always attach the cables to the hood pin bezel. Unless I am going for oem look.

What about taking it one step further.
Attach the cable to a screw through the bezel and hood..
Run a wire along the inside of the hood to the bottom of the screw.
Use the screw, cable and clip to get a ground through the pin post.

That ground could be used for a warning light if the pins are not clipped. One light per side is better.
Using a system that illuminates unless a ground is detected is even better.

Just a thought.