Most of the time, the drain hose sticks out through the vent holes of the outside refrigerator vent panel.
It usually sticks out a couple inches to allow room to remove the vent. (when needed)
It is this way on my current 4 door Dometic and all but one other unit we owned where it actually had a hose that went all the way to the underneath of the rig but that was 25+ years ago for that one.
I'd bet yours is tucked up in behind the vent and draining on the refrigerator mounting floor and running inside.
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