Did a trial fit of the rear axle. Noticed they made an update.
They removed the ugly philips screw that held the clamp for the bowden cable
Here a pic of the older version:
The other side with the updated way to hold the bowden cable
The previous version:
The axle gets attached to the axle supports
Those installed, remove the nuts from the bottom of the air suspension
And bolt in place with the previously removed nuts
And here we will need to do a small adaptation to be able to lock the differential. As you can see the attachment point hits the air suspension. This is pointed out in the documentation.
Will be for another time.