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I ran mine through the big grommet behind the battery but they were a pain to get them through it. When it came time to run the positive cable for my amp there's a spot below the grommet that you can drill a hole that worked good for this, you can see it in these photos.
I went at it a bit differently. Used some plastic wire loom to encapsulate the power and video wires from the front camera. Ran that kinda parallel to the driver's front fender, then under the cowl and into the cabin near the A-pillar, then straight across the driver's side footwell area into the center console. Hopefully the pictures tell the story here.
Wires partway in wire loom Under the cowl Out the other side and towards the A-pillar Now in the cabin
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.
Front camera - routing wires????
Ran my 2 gauge amp and camera wires through the big grommet on my 13 GS. No issues for me. I did use a little lube. 
