I managed to fill the 4 trucks with coal, then got told to contact the controller before I moved off. Well I was trying to get in touch by clicking on the phone but no joy, got message as well to join up with the other trucks, when I got there I was on the next line to them, then I realised that is why I needed to contact the controller, he probably changed the points, any way I quit after that I had been on it ages. Col.
Or holding down the O key on the PS4/PS5 controller ( REF https://direct.playstation.com/en-us/accessories/ps4 ) ? For Xbox, based upon what I see/saw at https://www.xbox.com/en-US/accessories/controllers/xbox-wireless-controller should be the B button.
