Caring for a baby Dekay's Brown Snake?

[Soner]

Hello all, I'm new here and I found what I believe to be a baby DeKay's brown snake at work today! He seemed to have slithered through the back door and into the kitchen. My co-worker was going to harm him, so I took him home in a takout box and he is currently residing in a big jar with dirt, grass, worms and moisture. Winter is approaching, so I don't know if I should put him out in the wild or care for him myself? I am thinking of caring for him myself, so I am interested in what I'll need to make sure he's given proper nutrition.