I'm an European young adult, I don't have much knowledge of American history, but I'm attending a university course about Anglo-American Literatures and were indirectly studying the issue of slavery of African Americans. I've studied how trafficking worked "in practice", such as slave ship matter, but I don't know much beyond that.
If any of you know the answer to my question, I would be very curious to know more about the matter. Thank you.
Check this excellent answer from /u/sunagainstgold
https://www.reddit.com/r/AskHistorians/comments/5yzqeo/were_africans_generally_aware_of_where_slave/