Help..306 right joystick removal

Hello guys, my 306 rear wiper works on its own. I think there is a problem with the remote. How can I disassemble the control handle. I will be glad if you help me. I delirece. : ((

vice versa mine doesn't work either
Although there is no automatic rain sensor

My brother is very pressed. There are 3 screws under the box behind the steering wheel. you insert them and remove the covers. Everything comes out after that. You remove the socket of the arm to be wiped by pressing the nail and pulling it towards the torpedo. then you press the arm's fingernails and pull it to the side and remove it from its sled. it's up to you after that ...