Knowing tge way wiring harness manufacturers work, any break into the harnesses voids the warranty on the whole harness. Even their official harness repairs void the warranty and if any other electrical issues arise, becomes then the car manufacturers liability.
add to that, the most modern harnesses, that are the first items fitted in body build, are specific harnesses to reduce weight. In the past one harness his all, with non used wires cap0ed, but that was extra weight when ever gramme now counts.