He is meant to put physical addresses of where he stayed for long periods of time.
If he officially studied and lived there, he should have put in on DS-260.
There's no penalty for stating the truth, there's no need to match the answers to address on DL he should have updated...
What is he going to say if during interview officer would ask:
"Your school was 2.5 hrs away, did you commute every day while studying"?
Just answer questions directly and literally. Not to fit some "official" versions of truth.