[pro4nut]

Thats a Sony AV amp as well isn't it?

That Amp only supports an active sub and the one you have is a passive sub.
What that means is that you have to get a powered amp as that output only provides a line output so even if you connected it as someone has said you wouldn't hear a thing.

The only option i would suggest would be to wire the sub into either the right or left side front. With that amp (if it is like mine) you have the option to bi-wire, (run 2 wires) to the front speakers (speaker mode b) so you can set it to that mode and use one of the outputs to power the sub.

The terminals to use are the ones to the left of the botom row, visible on the picture you have posted to the left.

Another tip, pop the plastic plugs out of the ends of the terminals and solder some corrally plugs to your speaker wires!