What's worked for me is to run the right side between the grill and the radiator to the left side. Leave yourself a little slack for ease of working. I run both a positive and a negative.
The clip on my '47 was attached by drilling a hole in the dog-leg just below where it goes into the hood. It's kind of noticeable.
If I were putting clips in myself, I would drill two in the lip of the hood and mount the clips there. This would hide all of the hardware. You could also do this and use zip ties if you didn't have the clips. This way, everything would be nicely hidden from view, but still accessible.