You can call the SC office, provide the serial number for more info. I’m sure it was intended for finger picking so no pickguard. I own a OOO with a pickguard. I would call SC and ask to buy a pickguard for the OOO. That way you’ll be getting the one designed for the guitar, the correct thickness etc, and the choices available. I would also ask if they could recommend a dealer near you to do the work. You want to make sure it’s on there so there’s no residual vibration.
Where are you located?
SC OOO all KOA, Brazilian Rosewood binding, D-Law