Where is the protruding part on the left wiper?

[Johnny]

The protruding part on the left wiper is located at the connection point between the wiper blade and the metal swing arm of the wiper. The method for using the car wiper is as follows: 1. Locate the wiper control lever on the lower left side of the steering wheel; 2. Push the wiper lever up one gear to start the wiper operation; 3. To turn off the wiper, push the lever down to the 'off' position. The function of the wiper is to remove raindrops, debris, and dust attached to the vehicle's windshield, thereby improving the driver's visibility and enhancing driving safety. The method for replacing the wiper is as follows: 1. Lift the wiper up and press the clip below to remove the wiper rubber; 2. Remove the wiper and lift the front end of the middle clip; 3. Insert the wiper into the middle clip and pull it tight by hand. Once you hear a click sound, the replacement is complete.