General Maintenance & Repairs - pcv flow diection and oil consumption

so i pulle my intake b off tn after i noticed some oil consumpion and sure enough its soaked in oil. ive already done the ls6 pcv conversion by my question is kindof hard to ask with out sounding dumb. lets say i suck on the pcv, which direction hould it be placed? do i want air to pass though back into the manifold or do i want it to lock when flowing back into the intake? also which one of the two lines needs a catch can? do any companys make a catch can with 2 in and 2 out so i can have both lines hooked to it.

Pretend your lips are the intake manifold. If you suck the valve will allow airflow, if your blow, it will close.

You only need a single in/out on the can. The left, right and centre of the engine crankcase are all connected. There are plenty of routing diagrams on this site. I installed the Mike Norris can recently, it's a very nice piece.

Should I have a PCv on both lines going to the intake.