Wondering wher the best place to drill thur the firewall for Amp power cables

 

No drilling, please.

http://liljerk.morpheus.net/350Z/firewall/

 

What i did on mine is i cut a lil hole on the rubber protector enough to insert the cable

 

Behind the battery, there's a perfect pass-thru. Just cut an "X" or a whole to the size of your cable on the rubber grommet that's located back there and it'll come out right behind the passenger-side dash and you can then snake it to the rear of the car under the carpet by removing the trim. Just be sure to use a grommet or some other type of protection anywhere the cable bends around sheet metal to keep the wire's insulation from stripping over time, causing a short.