Questions ab changing thermostat housing 2009 aveo5 LT

[DTR34]

changing my thermostat housing and cannot find the coolant plug anywhere despite a pretty extensive google search. Also cannot figure out how to unplug this thing.
any help? thanks.

Edit: The coolant plug on the radiator was above the drivers side nipple about an inch up. (facing to the right if your looking straight at the car)
I got the 'thing' unplugged by unclipping each side of the hose and pulling. Its hard to tell when its unclipped, and the clips break easily so be careful