I am in the process of installing my CC. Every thread I have seen says insert ur check valve with the black end facing the TB. Ok. Well I have the BWoody CC and BWoody Check valve but the check valve is all white and both ends look identical. So I blow in one end and no air goes thru, I blow in the other end and air passes. What makes sense to me is that the check valve should be facing with the end that air passes thru should flow towards the TB. I want to be sure that I am right. Can anyone confirm this for me?