Install USB socket for cigarette lighters

Hello dear community, in order to get some variety in the tristesse. I would like to exchange my cigarette lighter in the car for a 2xUSB socket. At youtube I actually did not get all the questions answered. First: I am lay, however, as far as car technology is concerned, I do not have so much 2 left hands, that I would not be able to do this myself with a reasonable instruction. State of the art: https://www.bilder-upload.eu/thumb/f9b737-1584782883.jpg A black, a red , a yellow cable. The red one looks black-red from the other side:https://www.bilder-upload.eu/thumb/5ae15d-1584782939.jpg This should be pure:https://www.bilder-upload.eu/thumb/c16c1a-1584782967.jpghttps://www.bilder-upload.eu/thumb/dee1f8-1584783035.jpg I found this right in the basement:https://www.bilder-upload.eu/thumb/abfbcc-1584783067.jpg 1. Can I just snap off the 3 cables? 2. Do I have to take out a fuse for this? (the cigarette lighter funktitif67.jpg). I guess the third cable (yellow?) is the earth. What do I do with it? 5. I’ve never worked with these “clamps” (?) before. I guess I just plug the cables through the red things and then snap that with a plier to keep it going? Thank you!