I've been searching for mine tonight and finally found out where the hose is located.
On the drivers side in the interior if you lean down under the steering wheel back behind the console you will see a hose about 1/2" diameter exiting through the floor.
Down under the truck right above the front drive shaft is where the water exits. There is a silver heat shield or sound material with a hole where the water drips through.
8/14/2015 Ordered 2016 Canyon diesel CCSB, SLT, Copper/Red, black interior, Bose, spray in liner, transfer case shield, bars package and block heater.
Dealer received 2/3/2016
I received 2/5/2016