This is a question for those who have installed amps in 07 Avalanches, but does anyone know where the best place to run the power wire through the firewall is? I wanted to do on the passenger side but it looks to me like theres a plastic vent cover blocking it. Does anyone know where a good place to run 4 gauge power wire is? Its pretty cluttered under there in the engine bay. This is all I have left to figure out before the system goes in this weekend. Thanks.