Not familiar with the location, since on my Flagstaff it is accessible; even if a pain. If it was me, I would clean the area where it is screwed into the track real good and replace it with a 90 degree zerk fitting. That is dependent upon you being able to unscrew it from the track and screw in a new one.
As for the warranty. My dealer told me that if the system is not lubricated correctly it would void the warranty. So if it is returned with a broken cable and it is a dry track, I guess it could be a problem. But a lot will depend on the dealer and I can only guess, a lot will depend on if it is the selling dealer. And at times, you might have to use a non-selling dealer for repairs.
But Murphy's rule will cause the track to break the first night of a long vacation. So you are right to want to grease it correctly.