Hello,
To achieve this you have to go to the game, connect to Wolrd Of Trucks, then you enter the profile to which you connected it, then you go adjustments and you give in Online, as shown in the image:
https://i.imgur.com/RDUAJAA.jpg
Then you give in to connect and it will load all the DLC's that you have available to connect and ready.
https://i.imgur.com/qXaPck1.png