When you loaded the camera you probably wasted about 6" of film not including the leader. If you therefore leave some film sticking out the cassette when you rewind the camera, or use a leader extractor if it has wound all the way back in (auto rewind). You can then cut the leader off and start loading the film past the ball bearings in the spiral (in the light) before you put it in the changing bag (make sure the core is already iside the spiral) before putting it in the bag with the tank and inner lid. In the bag, pull out all the rest of the film from the cassette, load the spiral and rip the end of the film from your cassette using your finger nails. Finish loading and secure in tank with the inner lid on.