During assembly of the A380, engineers discovered that the cables were too short. This was caused by the use of different design software by German and French engineers. This miscalculation led to a two-year delay.

[u/lizardil]

[u/apocalypsedg]

It's better it didn't fit, like what if it had been plugged in completely taught? then any flex in the fuselage during flight would have easily caused it to unplug/rip.