Or do you just use the existing plug with an adapter, and join the new wire on the car end?

In the process of installing a new system in my J11, and in the next few days switching out the speakers, which are running new wires from the amp. For those who have done it already, so I know what to expect, how hard/easy is it to route the wires through the door jams? Haven't had a look yet, but ...

Thanks for everyone's answers. Makes sense, now just have to figure why the left rear seat is showing buckled, when it's not!

Thanks for the answers. I hadn't actually taken notice of the first radar warming, not sure why that's on, car was just detailed and nothing in the way.
And the seatbelt makes sense now, given the icons, except none of them are buckled in?

Hi, Just picked up my new to me 2018 Qashqai, and was hoping someone could answer what is probably/hopefully a simple question. Upon start up I get a overhead view of the car with a seatbelt icon and three circles under it. It disappears after a few seconds, and now warning msgs appear in settings. ...