BK2 drive shafts on an X6??

[cutting edge]

Have i got this right i have got a second hand BK2 and i am trying to fit the rear drive shafts to my X6 but i can't see how to do it for the life of me ?????

I thought it was all going well rebuilt the rear of the car just swaping the drive shafts over but they dont fit into the Diff so i presume i only need the outer axel and the B4 dogbone as such

How do i do it ???????

Anyone got a photo of the finished Drive shaft????

Thanks