How to hook up a 3.5 cable

Yes how do i correctly hook my raspberry pi retropie to my old tv set using a 3.5 cable converter ? I know i have to match the red , white , and yellow with each plug but do i put them in all input or 2 in input and one in output ?

Hi @Van1975!

Which cable exactly you have?

Is it something like this:https://ibb.co/gNgxPR

Yellow plug is for the video and white/red are for the stereo sound.