Yeah, they will it just takes some time. You have to understand that you just introduced them to a new cage and now you introduced them to another new place. So they will need time to adjust. Starshine suggestion is actually what I do as well, My three
cavies have 4 little hidey homes and we put one in each corner facing the opposite with a tunnel in the middle for them to run through, huge hit. Also we put down something, usually a small step stool, in the middle and they love to run laps around it for exercise.