open the hood, look at the left side of the intercooler, slightly down and to the left of the intercooler is the downpipe (exhaust pipe with heat shields on it) directly behind the downpipe is the firewall, look at the firewall and follow it downwards till you see a medium sized black hose coming out of the firewall, maybe 6 inches long
I'm not 100% sure on the SH models, but I'm almost positive it will be a rubber hose about 3/4" in diameter pointing down. It will just have an open end. The hose will "disappear" into the firewall just about where Conner said it was. It's below the big wiring harness thing too. It's down there quite a ways. I would bet it would be easier to get to it from below.