CS100 CBE: in-person or virtual?

Just realized while prepping for the CBE tomorrow that I have no idea how it's administered. It says on the website that it's typically given in-person, which is what I assumed, but I haven't gotten any information about where and how that would happen. I did get a canvas invite that has an exam that says it opens by itself, so am I just supposed to take it at home? 11:30 the night before felt like the wrong time to email and ask lol