Can I do it this way? Im new to car audio so bare with me. I get a wiring harness that goes to my car which will have the wires (Yellow, Red, black) Battery, Run, ground. I connect those to the aftermarket deck wiring harness. I tape away the speaker wires from the deck wiring harness. I install 4 sets of speaker wire that goes to the 4 channel amp to the speakers. I have the illumination wires, remote wire and 12 volt installed. I install in 2 sets of RCAs from the desk to the amp. Will this method work or am I missing anything?