xr-sa

I am wiring up a Koso XR-SA guage to my Yamaha yzf600r. And I am having many troubles. 1) Accesory 2 and 3 have each have a blue wire that is not in the diagram. Does anyone know what this is. 2) the stock guage did not have a fuel indicator but just a fuel warning light. The koso has a fuel...