Send the updated transcripts to AMCAS and they'll send it to the respective schools.... As far as I know, that's the procedure.... Please correct me if I'm wrong.
But I have heard of people sening in transcripts directly, but never heard back how it went.... You can even call the medical school to which you want your updated transcript to be sent and ask them if they would prefer to get the transcript from AMCAS or yourself.
Good luck and congratulations in successfully turning in your primary.... Also, Much luck during the entire app process.