Disclaimer: I cannot see the picture(s)

On my Alfine hub (same cable attachment as Nexus, I believe) the cable has become frayed at the clamping nut on the loose end almost every singe time I have assembled it. If it doesn't fray when I assemble it, it frays the first or second time I remove the calbe to get the wheel off. In my experieice with Nexus hubs, I can recall a few strands breaking on the other side of the nut (the tensioned side) on assembly. I think it is an issue with the clamping nut, and you need to be 125% gentle with it during assembly to avoid any fraying or broken strands.