Please help. This is not my frist car stereo install, but I am thoroughly confused. It has no wires for the speakers ie front left front right so on and so forth. It only has rca plugs for front channel and rear . Is there an adapter for cars that dont use rca style plugs? One install place told me to use a set of rca plugs and plug them into the unit then splce the other ends. Ony thing is how do I know + from - ? Left from right?
Please help