What do you mean by new cables?
The current cables are staying where they are. They are getting reconnected to an anchor in broadly the same location. The counter-tension is being transferred to the two outer back posts of the cage, and the middle back line. Instead of to ground as is the case now. The back cables are getting binned, as is the pier.
The truly 'new' cables, will come much much later, when the new roof starts going and the quadpods are in place. About 3-5m above the existing ones at the lowest level at the stand edge, and about 25m above at the highest point.