It means they already killed the original traces for the port. The 'strange' wire is one of the data lines for USB. That's an alternative location for it (a bit debatable as apparently some of the electronic protection is not available at that point [fuse if i remember])

you're in bit of a problem - need to find someone really good at SMD soldering to do it for you. They'll most likely need to use two 'strange' cables

Good luck