i'm gettin ready to install heated grips on my bike ....i have service manual ,directions that come with grips ....has anyone done this on their ultra? any tips or pointers....it doesn't seem to hard, just time and patience...the directions that come with the grips seem to make sense until i get to the fuse box ...as there is no wire in the section where they say it should be when installing to fuse box..if you have done this you know what i mean... also my fuse location says 20 amp abs not p&a ign like illustration....help.thanks for any info