Chris Bryant has a lot of
Service Manuals on his website. See if you can find your model and maybe there's some help there.
Must admit I'm confused. The VERY few RV fridges I've tinkered with or looked at had only a fridge compartment drain, under the fins. I have not seen one from the freezer portion. They also did not have what I'll call the Forced Defrost (where the cooling coil is actually heated to melt ice) like a home unit. They have merely thawed out by being OFF.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB