Here are the rest of the cables to be used...no Monster Cable...it's budget, okay?
Rear seat removed and some of the deadening fabric removed for wire access.
5-10mm bolts removed and the front passenger seat can be moved enough to gain access to the area below the carpeting...unfortunately, years of spilled drinks and objects yielded this nasty view!
OEM Becker amps, control unit, and trunk panels stripped out of their locations to make room for the new gear.