Need help figuring out what happened and how to fix this. Replaced breaks and repacked bearing a little over a year ago, but had some issues so took the trailer to a small rv place that was available on a short notice (the place had decent reviews and surprisingly was available next day). Seemed ok after. We only went on a few trips since then. Just got back from a five-hour drive and noticed trailer breaks not working intermittently last part of the way, and break controller showing 'open circuit' or nothing at all from time to time. Tried some diagnostics to isolate the issue. So this is what happened with the wires Why/How did they rub over the hub (?) Do I have to replace the whole section or just the part that damaged? How are they supposed to be so it doesn't happen again? I don't really want to take the trailer to the same guy or anyone else if it's relatively easy and not too time consuming since I only have limited time until our labor day trip. Thank you your input.