not 100% sure with those motors sorry. , mine was an ecotec. like old mate said above, needs to be befor throttle(on manifold side) he said brake booster so i would try that, i think he's the one that did the 'sc14 how too' so would listen to him.
theres another hose that needs to be moved too, 'the engine breather hose' it has to go befor the supercharger or will get some of the boost pressure going into motor, think it normaly comes out just after throttle(airfilter side) but has to be moved into airfilter or somewhere befor charger, think some people just hook up a little filter to it too. .. should make sure its all done right first or will just stuff ya motor.
also the little vac line pipes that come off each end of the charger needs to be hooked up right too. there just open in ya pic. from memory theres 3 that come off the charger and they need to be all hooked up together with vac hose and a t-piece.