The Igus cable carrier supports the cables providing power to your slide, if you extend the slide and look underneath, usually right near the ends you will see where it attaches. The problem I had with my Suncruiser is that Winnebago uses pop rivets to hold the Igus carrier to the slide at the ends and it quickly becomes loose, allowing the system to flex and break.
I am sure Winnebago will take care of your problem but if not you can order the individual chain pieces from McMaster Carr. You will have no problem replacing the failed pieces, they just snap together. I would recommend you attach the end piece to the slide with nuts, bolts, and washers instead of pop rivets, it will last much longer.
Just my $0.02