2-1. Detach and remove the knockout that matches the desired venting direction
3-1. Insert the male end of a 4" elbow into the female end of a short duct. Tape the joint.
2-2. Reconnect the new duct[8.66 inch(22cm)] to the blower housing, and fixing the duct to the base.
3-2. Insert this assembly elbow first through the hole in the dryer and push the female end of the elbow onto the male end of the blower output shaft. Tape the joint.