running dual catch can set up

[FlamboyantStealthTT]

ive heard the best way to run catch cans is using dual catch cans for our cars. can someone please draw up a diagram on paint or something on which hose goes where for a dual catch can set up? thanks.

im planning to run dual weapon r universal catch cans. the design is like greddy, cusco and most ebay ones. does it matter which port is the inlet and outlet?
http://www.weapon-r.com/products/ima...26-213-101.jpg