Preheat the smoker to 225 degrees.
Score the pork belly fat cap. Combine the spices and rub the mixture onto all sides of the meat.
Place the pork belly on a grate with the fat side up and transfer it into the smoker. Cook for 4-6 hours until it reaches 160 degrees. Spritz the pork belly with apple cider vinegar once per hour during this time.
Wrap the pork belly with aluminum foil or butcher paper and cook for another 1-2 hours until the pork reaches 200 degrees.
Keep the pork belly wrapped in foil and rest at room temperature for 10-15 minutes before serving.