To register for SSS as an Overseas Filipino Worker in Israel, you need to fill out the SSS Membership Form, which you can usually obtain from the Philippine Embassy or Consulate in Israel. Along with the form, prepare a valid ID and your employment contract or proof of work. After completing your application, submit it to the SSS through the embassy or directly online if you have access to their digital services. For more detailed guidance, it's best to check the official SSS website or contact the nearest Philippine Embassy for assistance.