Cable Forum - From 6-channel direct to RCA? How to:

Hi,
I need some help with my wiring https://www.cableforum.co.uk/images/...2005/06/36.gif

I need to connect my Logitch Z-5500:
http://www.logitech.com/index.cfm/products/details/US/EN,CRID=2,CONTENTID=9486
from one of these inputs:
http://www.tweaknews.net/reviews/z5500/img/z11.JPG
to an Left/righ RCA white/red

Chech out this attached picture for a better explanation https://www.cableforum.co.uk/images/...2005/06/36.gif And to see what iÃƒÆ’Ã†â€™ÃƒÂ¢Ã¢â€šÂ¬Ã…Â¡ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â´m doing.
http://img70.echo.cx/my.php?image=hmmm3wf.jpg

So how would it be best to do this?
The front/rear channels can mix, donÃƒÆ’Ã†â€™ÃƒÂ¢Ã¢â€šÂ¬Ã…Â¡ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â´t mind that. If I would connect only ONE stereo-to-RCA cable to the front channel on that volume controler would onlt the front speaker sound? Or the rear and subwoofer also?

I know nothing about this wiring... so would doing something like this:
http://img28.echo.cx/img28/1486/hmmm24qz.jpg
be just stupid? If not, how would I assemble this?

Any suggestions are welcome,
Thanks :)

**Edit**
Links are fixed, thanks for the head upp Paul :)