At this point, the South Carolinian Government knows that if they stick with the Patriots while refusing to adequately defend themselves, the British will inspire and support escape attempts and perhaps even revolts, so they have two options as I see it
1: Get with the program, reinforce their defenses, hope they don't lose to many slaves to the army
2: Negotiate a way back into the good graces of the British, gambling that British weapons and ships will defend them against the continental army and that the slaveholders remaining in the Continental Congress will shut down any attempt to inspire a slave rebellion by the patriots.
As it is, I can see it going either way, with choice one supported by the current government as the alternative forces them to beg for forgiveness, while the powers opposed to the government as it stands (legislators opposed to the majority wishes, landowners who had their influenced reduced by Patriot politicians) supporting the second option, if for no other reason then to gain power. I don't see any dissent to whatever decision is made as being enough to take control of the colony by itself, however outside influence could tip the balance if a power struggle erupts.