It was asked in Q&A for 2014.
Q454 and Q445.
Highlights:
"Installation of connectors would make the resulting assembly a FABRICATED ITEM."
"Some additional work must have been done to the part (e.g. trimming leads, adding connectors) after the 2014 Kickoff for the part to be legal per R13."
It was asked in the context of the rule that 45 lbs fabricated components (including spares) must be brought into first day of competition and inspected and that additional non-COTS items could not be stored outside the pits and used on the robot, hence the reference to the 45 lbs limit. The implication was that spare motors must be brand new in box motors with no connectors and they would be exempt from the limit.
Hopefully they straighten this out this year. Or we're going to need more motors.