First, get your drilling machine and a drill bit the size of the expansion tube. Mark the spot(s) where you would drill the wall hanger into. Drill into the wall slowly and push the expansion tube using a hammer gently. Cut any excess expansion tube protruding out of the wall for a smooth surface. Then, push the wall hanger with screws gently into the expansion tube. Tap using a hammer gently to push the screws completely inside. Check if the hanger is mounted firmly.