Which hole at the back of BOSE Wave Radio, to plug green cable in?

[StackExchange]

I plugged one end of this green cable to my laptop's port. By trial and error, I plugged the other end in each of the 4 holes in the green rectangle below of my BOSE Wave Radio/CD below. All 4 holes sounded, turning my BOSE into a computer speaker!

But which hole is best for the green cable?

 

[Trebdp83]

The green cable is a 3.5mm cable. The BOSE has RCA ports. You need a cable adapter or combination cable to connect to the AUX IN ports.