Im in the middle of installing Injens CAI for my 04 mazda 6s V6..well the smaller nipple that comes off the intake that is closest to the sensor that goes on the top of the intake...well there is a hose that runs to it but the nipple is closed off...so my question is...Is That Nipple Supposed To Be Opened Up For That Hose Or Is That Like A Dummy Port And Should Stay Closed Off With The Hose Just Pretty Much Doin Nothin But Sit There?