You should sit in the examination room according to the examination number. If it is a unified examination organized by the school, your classmates should be near you. Even if you don't know him, you can find a way to find the academic affairs office of the school. The academic affairs office should have a unified seating chart to see if people are willing to help you check it.
If you are a social candidate and register separately, this is even more difficult. You have to ask more about the registration office. If someone is willing to help, you should be able to find it.
Good luck.