Marc, the proper way to interconnect the components is shown in each of the owners' manuals. With rare exception, everything should have input and/or output jacks labeled appropriately.

As for setting up the room, besides the fact that a square room is not ideal, try this:

The TV should be centered on one wall, with the main L & R flanking the TV, at a distance somewhere around halfway between the TV and the corners, and, of course, the center above or below the TV. Avoid the temptation to put the TV in a corner.

The rears should be directly to the sides of your main seating, but higher, maybe at about 6' from the floor. In spite of being called 'rears', they usually sound better, and allow for better seating, placed to the sides.

If you have a subwoofer, only trial and error can tell you the best location, but some experts recommend placing the sub where you sit, and crawling around the perimeter of the room and listening for the best bass. What's 'best'? Deep, but tight. Should not have that 'overwhelming, one-note' bass that Bazooka-type car woofers have.

The last rule: Experiment!

Larry
www.fineelectricco.com.