Ortensio

Hello. My name is ortensio. I would like to connect a TV to the aviz z1 system, I want to listen to the tv's sound by the z1 speakers. Should I use rca harness connected to rca connector 2? I have got a wiring diagram of the connectors but I don't understand pins names like "POSWL, VTR_L, VIN, etc" Does anyone know how could I make the TV play sounds through the z1? Thc.