hey I have an on 05 Mariner I just bought used it didnt come with a manual but it has a cd player and 2 small subs at the base of the door so i suspect its the 4 speaker system...basically I know how to wire an amp and subwoofer but how can i hook it up with my factory head unit?( I just need the outputs) I read that Line output converter can work but do i just wire it to one of those rear speakers? and what fuse should i connect the remote wire too? I want to run the amp so its only on when the car is turned on. Thanks for your help guys im new to the mariner im just a oldschool muscle guy that knows the basics.