Omi A 2,0 Differential – how to make one of the 24v fitting?

Hi! On our 1992er Omi A 2,0 Caravan the differential has said goodbye. After we have still one of the 24 V it was close to install this. Some experienced screwdrivers told us in advance that the whole thing is compatible without probs….. after a few hours of intensive screwing we have now determined (differential already installed) that the drive shafts have a larger hole circle on the wheel side than the hubs of the 2.0i. Does someone have an idea how to do this nevertheless properly m it gets connected to each other? Or can we re-extend the whole story and go looking for a diff from the 4 cylinder??? We would like to avoid that if possible…. Thanks+Greetings Jürgan