Do you have a front mount of the standard top mount?
You have 1 choice with the top mount and 2 with the front mount.
Front mount 1
Take off the standard recirculating valve. Get a bit of pipe the same diameter as the standard one welded to the flange, secure with a hose clamp. You must plug the hole which the recirculating valve used to route the air back into the turbo intake tube.
Front mount 2
Take off the standard recirculating valve and plug both the port it connects to on the intake manifold and the one in the turbo intake tube.
Weld the hks flange onto the intercooler pipe that is connected to the intake manifold.
Top mount (same as front mount 1)
Take off the standard recirculating valve. Get a bit of pipe the same diameter as the standard one welded to the flange, secure with a hose clamp. You must plug the hole which the recirculating valve used to route the air back into the turbo intake tube.
With all 3 of these you need to give the HKS SSQBOV a vacuum signal, you should re-use the vaccuum hose which was connected to the standard recirculating valve.