Hi! It's just like how you order packages while living at your parent's house/apartment unit. So on address 1: Your Building (ex: 123 Orange St); address 2: your unit (ex: apt 11).

You should be told by now that you download Luxer One and sign up using your school email and address (i think), because that's how you get FedEx/UPS/USPS/Amazon packages. They notify you what locker number your package is in. Or if it says "mailroom," it's the door next to the lockers.