i was given a surround sound ststem by a neighbor who is moving and i have no idea how to hook it up.right now my cable box is hooked up with a hdmi cable and the surround sound does not have that input.how can i hook it up yo tv without that cable.also do the cables go out through receiver or in to receiver.so confused.it does have a port for red blue green which i have 2 sections of cables if i have to use that