First, you need to apply lubricant to the left and right wiper blade hose ends, next, connect the left wiper blade hose to the left wiper blade, and connect the left wiper blade hose to the tee-fitting, then install the left wiper blade hose to the air inlet grille panel, connect the right wiper blade hose to the right wiper blade, finally connect the right wiper blade hose to the tee-fitting.