ok ive searched for this and cant find it, sooooooooooo i wish to turn my rubbish sound system of 2 tiny bedroom speakers into 2 6 by 9s and 4 component speakers with 4 tweekers

, however currently i only have 2 wires. i do not wish to add an amp as i dont really want much bass and i cant be doing with all the wires and the extra cost. (plus the component speaks are self amped anywhere and the 6 by 9s will only be cheap ones so if i did have an amp on them they would probly blow. so the questions i need answering are below
1. will there be 2 holes in the back of my head unit for an extra 2 speaker cables?
2. is it possible to just slit a wire and thred another wire into it turning the single speaker cable into 2 speak cables or is there like a little connection part for this?
3. or is it impossible or would just sound pants and masewell buy a cheap amp?
many fanx simon