The wiring to all of the terminal connections on the regulator / rectifier seems fairly clear except for the "C" connection. Does anyone know what this is or what its purpose is? It appears that a 12VDC + line connects to the "R" and "B+" terminals and it may also connect to the "C" terminal as well. Schematics in my Rotax 912ULS manuals are cryptic at best when describing terminal functions and appear to include a small lamp of some kind connected across the "C" and adjacent "L" terminals. I don't plan to have any such lamp so I'm wondering if I need to wire anything to the "C" terminal. Any further insight on how to connect up to this "C" terminal (or not) is appreciated.