basically what the Tin says, say the CSA wins early in the war, say September 1862, they take DC and force peace, any ways, what would Slavery look like after the war? how long would it last? and how would it end?
The CSA's ruling classes had a considerable vested and emotional interest in slavery and no great interest in elections they could lose. Presuming it holds together (far from a given) it will take a revolution to get the Confederacy to emancipate on any real scale.
As to the status of the freed slaves, it is kind of murky although they would most likely be seen as second class citizens for many years to come, either they will go north to the rump USA or there would be an effort at repatriation back to Africa with incentives such as land and/or money/gold. That's my take.
This is basically it, though I'd change "rebellion" to "revolution" since the former are not going to be unknown in the Confederacy.The only way Confederate slavery would have ended is through internal rebellion or external conquest.