I need help setting up my sound system

[jascl22]

My dad brought home some speakers and a receiver last night so I just started trying to set it all up today. And I'm struggling quite a bit to say the least. I have some pictures of what I've got set up so far, so hopefully you guys can point me in the right direction and advise me on what things need to be plugged into what, as well as what equipment I might need to buy:

I connected the individual speakers to the cables


The other ends of these cables were connected to the back of the subwoofer


Then I connected via cables the subwoofer and receiver


Here's the back of the receiver with more detail just in case


At this point I've used everything that came in the boxes except for this cable that I don't know what is used for. Both ends are identical:


So now I'm stuck. I have nothing to connect the receiver with my TV. The only thing that is really going to be using the sound system is my PS3. Are there extra cables I need to buy to get this thing going?

I appreciate the help. Let me know if anything has been done incorrectly so far.