I have a Yamaha 9.9MSHB without electric start. I see that there are two wire pigtails hanging below the flywheel that are not connected to anything. I am looking at the Generator parts diagram and see that there is a lighting coil. I assume that the pigtails are extending from the lighting coil. Can I use the lighting coil output to charge a battery? How much current and voltage can I expect? Is there a rectifier/regulator available,