Freezer drain plugged

Where are the drain lines for the freezer in this unit in the back. I cleaned and defrosted the unit but still have water puddling in the bottom of the freezer from the coils. I was told the drain line may be plugged but the parts manual for the unit does not show the location of it. What am I looking for and where is it located. Do they go into the compressor as I cannot see any drain lines. Where can I find a repair manual for this appliance?