Yes - the chain arrives premade with the cables installed. The chain was getting so heavy and wide, we had to remove numerous spare conductors before it was built.
One simple mistake has led to this problem. All we have left are the #8s and various #10s and #12s. We can't split the load. The only option I can think of is to parallel two #8s together - otherwise the chain has to come back down and sent back to the factory in Germany
Adding a cable would be difficult as these chains are designed in such a way to avoid cables contacting one another.
An engineer I know spec'd it but the responsibility falls right at my door.