Open your metal hose clamp fully and slide it over the semi-rigid duct. Do not force a tight hose clamp over the duct as it can kink, rip or otherwise damage the duct.
Grasp the semi-rigid duct and with a side-to-side twisting motion, slide it over the connection on the back of the dryer.
Rotate and slide the hose clamp so that it is on top where the semi-rigid duct overlaps the dryer connection.
Tighten the hose clamp with your screwdriver to secure it to the dryer connection. Snug is best; over-tightening the hose clamp may kink or collapse the duct connection on the dryer.