The OEM part was on the car and I was simply putting it back. Honestly did not know the function. I originally was not going to use the metal pipe to the valve covers from the TB at all and have a catch can that I can't mount until engine is in the car (because I don’t know the space limitations). Decided to put as much of the original back as it was until then. I clearly did not know it was a BOV which is why I questioned hooking my BOV to the 3000 pipe . Clearly, to me, the BOV was not attached.
I suspected that my 20 buck elbow hose was a waste and that all of that would disappear with the catch can. The valve in question looks like a gulp valve off a BMW and I didn’t relate it to a BOV.