Rear of head is an outlet, pipe from rear of the pump housing is an inlet/return.
People set it up this way, however from what I see the side inlet/return should always get cooler water. The water after turbo will probably be marginally hotter than the current water but there is a chance it will be re-circulated back into engine. Although people say its fine, I will see what happens when I get mine going (going to set it up this way). If i find it too hot for my liking, i'll change the return point somewhere else.