The most accurate response is: Most became workers or laborers supporting military forces.
Enslaved and free Black people in South Carolina contributed to the Revolutionary War primarily by serving as laborers and support personnel for the military. They were involved in various capacities, including as cooks, teamsters, and construction workers, helping to supply and maintain the Continental Army and state militias. Some also took up arms and fought for the Patriot cause, while others were promised freedom in exchange for their service.