OMARL956

i plan on putting a four channel on and im a little stumped.... i know that the bose amp for my interior speakers is in the back because i disonnected one plug and the fronts went out and likewise with the rear. question is i used a 4551 metra harness which runs rca's to my brain on my flip out. now i know im supposed to connect power and all that but the rcas would go to the amp now the problem is that amp came with input harness for both sets but which wires from the bose amp are the wires for the speakers. any clues or ideas buds?