Adding middle school grades to the Courses & Grades section?

This section is required for USC; it says, “Do you have other courses (middle school, post-12th grade, summer, etc.) listed on your transcript that have been issued official transcript grades?”
I have two math classes and one foreign language class that I took in middle school but still appear on my HS transcript and count towards my GPA. I can’t add them to this section without selecting a school, but I took them at my middle school and not my high school. To add my middle school I would need to include it in “other secondary schools” in the education section but this seems wrong. What should I do?

Do not include anything you did during middle school. You should only report High School Courses.