Oh yeah. Out the back. 90 degree elbow. I see now.
Anyway, this is the stuff I'm talking about. Glues right into gate valves, elbows, whatever. It's the black hoses. One across the back. That's a return to the sump/fuge. The other is the output for the skimmer before it goes into the sump/fuge. Hadn't done it yet, but the "T" you see still had to get the hoses glues into'm. Ended uup with white hose there.