just add the other school on the AADSAS and enter the scores the same way you entered them on your main school. get a matching form for the transcript for that school and send in the transcript as you would normally.
it depends on the schools you are applying to. if i remembered correctly, most schools wont ask for your transcript directly until they've reviewed your app. so for now you only need to send one to AADSAS and hold off on sending to other schools until they ask for it.