Truthfully those RCA cables are a bit outdated, and most TV's use HDMI nowadays. If it's an older model, the yellow is your video signal, and the red and white are for stereo audio. I am colorblind personally, and had a hard time growing up telling between the red and yellow cord. You won't mess anything up by plugging in the wrong cord to the wrong port, so just plug in a cord at a time until you hear or see something, then start playing with the next one. You may not use all 3 cords, depending on the model of the TV you're plugging into. Just guess and check your connections