I had the same issue, I managed to repair the cable using copper conductive tape purchased from Amazon. I carefully scraped away some of the insulating covering until I had a conductive surface on both pieces of the antenna. (Checked this using continuity mode on my multi-meter) then bridged the two pieces with the copper tape. Then I covered the repair with capton tape to insulate it. I reinstalled in the surface using capton tape to secure it and I did not use any screen adhesive in that area (to avoid making it too thick) I can confirm that the wifi is working perfectly again.