2g bov vacuum

[dsm414]

just got an aftermarket bov. i installed it and everything but im not sure about something. there are 2 vacuum spots. now i know the one on the front goes to the throttle body like on the stock one. but there is one on the back but lower also..
do i let that vent into the atmosphere or should i run it into something.....i would think that i would want to t it into the vacuum between the wastegat and the turbo so im not waisting boost... but im not sure