Water collection question

I just bought a used one and at the rear of the unit is a black disc like "plug " which is secured by a cover. You would have removed these to hook up your hose. Simply remove the hose and reinstall the "plug" and and tighten the cover to hold the plug in place. Now when you withdraw the water container from the front , if you look towards the upper rear you will see a " U ' shaped hole . This is where the water drops into the pan..make sure it is not obstructed Good luck!