To register for SSS as an OFW in Saudi Arabia, you can visit the nearest Philippine Embassy or Consulate. They usually have a dedicated desk for SSS registrations and can assist you with the process. Alternatively, you can register online through the SSS website if you already have a Philippine address and valid ID. Make sure to prepare the necessary documents such as your employment contract and valid ID. For the most accurate information, check the official SSS website or reach out to the Philippine Embassy in Saudi Arabia.