Dice the bacon and the onions. Place the bacon and onion in a large pot on top of the grill on medium heat. Cook until bacon is rendered and onions are translucent. Add the black pepper, kosher salt and chili powder. In a bowl, mix the BBQ sauce, yellow mustard and molasses. Then add to the bacon mixture. Drain kidney beans and great Northern beans and rinse. Add the beans to the pot and cook for 5 minutes. Transfer to individual 1/3-inch deep pans. To finish beans place in smoker uncovered for 45 minutes at 250 degrees F. Serve immediately.