Yes the CDI is behind the radiator it has one mounting screw and I scraped off powder at that screws location and put both of my grounds there. Don't think I got enough powder off or maybe having both of the grounds on the same location is a bad idea. I'm not 100% positive but I believe chrome is a conductor and therefore could be grounded to but I'm not sure so you shouldn't have to remove any chrome plating to get a good grounding surface. You absolutely need to expose bare metal to ground to any part that is powder coated. Paint an powder coating as well as ceramic coatings are not conductive therefore not usable for a ground.