The System and Structures factual report states after matching cables, that were fractured as result of the impact forces:
The short segment was also able to be matched with the recovered MS 27467T9B35P connector, which could only have been attached to the 5GA-J4 bulkhead fitting. According to the installation instructions detailed above, this harness should have been routed to the #2 wheel, not the #1 wheel. This showed the left gear wheel speed transducer wire harnesses were incorrectly installed. The examination showed that the right gear wire harnesses were installed correctly.
Sounds like they installed the speed sensors wrong causing the anti-skip to become inop.