The Cardas room setup / speaker placement guide is located here.
This guide provides suggestions applicable to a perfect world in which rooms are designed for audio systems. A world in which dooways, windows, and furniture doesn't exist. A world where spouses and housemates are onboard with all of your HiFi ambitions.
If you live in this world, then this guide should be quite helpful. If you don't live in this fantasy world, then it should still be helpful, but you may need to modify the suggestions to make them work as well as possible.
The setup guide represents the entirety of our knowledge. If you have further questions, we suggest contacting your HiFi dealer, or a professional room acoustics firm.