Unfortunately the previous diagram is not for the Fury
Here is the correct one if it is of any help ...
The connector is a 20 pin (gray) at the base of the instrument cluster (speedo).
Odds are the problem is related to replacement of the battery so an R&R is in order to see if anything appears disturbed. The speed sensor is to the right of the transmission output in front of the swing arm pivot. It's 3P black connector is above and to the right and not easily accessible with the rear fender and wheel in place. If you are serious about saving money you need your own shop manual, not mine