ill help u, google....lol
but the basic function of a catch can is, u have one vacum (IE intake line) one from the oil ports on the valve covers and one that leads back into ur oil pump line or something of the sort., or non at all.
running it with out a return into ur oil circulation would just mean u have to pour w.e oil is in the can out or back into ur motor.
if u google sr20 catch can and go to pics, u can look at how there run, and if u click back to web im sure there r 100's of write up nd stuffs!
GL