Instructions
Connect the PS2 end of your PS2 RCA cables to the data port on the back of the PlayStation 3 console. The PS3 and PS2 data ports are identical, so the cable will work with both systems.
Connect the RCA ends of the PS2 RCA cables to the RCA ports on your television.
Turn the television and PS3 on. Change the television to its RCA input channel, and you will see the PS3's downgraded visual signal on the television screen.