Well you have to put it at a spot in the intake that does not see vac. Luckily my n* adaptor plate has a port on it witch was perfect. I forget where it was in relationship to the throttle blade. I believe it has to be on the motor side of the throttle blade. And of course after the maf so that it is metered air. It is merely a vent to expell any gases or pressure. One draw back that I have heard about is that it may possibly allow minimal oil to go past the rotors in the blower but I have checked inside after a month and a have or so and all seems well so I stucking with it for now at least. I used a step bit and drilled a hole in the oil filler neck extension and threaded in a nipple and ran a line up to the adaptor plate.
