adamrs80

I'm installing an Infinity Basslink, and I was wondering if anybody knew the best way to get to the battery from the inside of the car. I know I'll have to go through the firewall somewhere but I'm not sure where to start. I also need to get a signal from the rear speakers (unless anybody can suggest a better way) Has anybody does this before. I've installed stuff before in a few other vehicles but nothing this nice so I don't want to screw it up. Any help would be greatly appreciated.