Would somebody please look at this diagram and tell me where I
might find the drain tube. And then tell me where it is on my
frigerator.
Please.

The fridge started working again after I turned it off and let it
defrost but now everytime it goes into defrost cycle water drips
from the vents in the ceiling of the fridge.
It seems like the drain tube is clogged because its cooling and
freezing OK now.
I suspect I had a problem because someone accidently left the
freezer open overnight. It froze up so the air wouldn't flow and
it made it seem like it wasn't cooling the bottom. Thawed it out
and turned it back on and now this.

Murphy's law.