I hooked my power cable to the booster post, no problem. Been like that for about a year. If you look under the dash, there's a rubber grommet above the pedals. You can drill it or just slice it and just pull your cable through. I sliced it in a cross pattern just enough to pull the wire and still seals. Or you can just take the rubber grommet and replace it ith something if you don't like the idea of drilling/slicing.