Label the cables. Get some small labels, one inch by three inches, and write one them something meaningful. You will not remember elaborate codes later on. Remember to use permanent ink not pencil. A small point that will be appreciated later down the road.
Most cables are color coded at the ends.
Red for right, white for left and yellow for video. Use the colors, they will almost always match the color of the jacks they go into. Next, the quality of the cable should be considered. Here, thicker is better. The cable with the largest cross section will transmit more signal with less loss.