You seem to think you are talking to someone you have spoken to before? This is not the case.
Do you not have an HDMI socket? The model number of the television is always useful in questions such as yours. I could find the instruction manual for it.
The connection is called Composite Video, using three plug, one is for the video signal and the other two are for left and right audio.
In home applications, the composite video signal is typically connected using an RCA connector
(phono plug), normally yellow. It is often accompanied with red and white (or black) connectors for right and left audio channels respectively.
Look for any markings around your
red, yellow, red, like LEFT and RIGHT or L and R. That is the audio.