just picked up a 2015 tahoe ls and purchased a pionner nex8100 and full memphis stereo system (amps, subs,speaker, and so on) there looks like no easy way to get a 4 gauge wire through the fire wall due to extra foam , sound proof material, and want to make sure its water proof with all the fuse black and can bus brain under the dash. any body have any pics or answers thanks.