I posted an answer to your question in the gear/maint section. Be sure not to confuse the deck connector for the steaming light with the one is for the masthead anchor light. They are both 2-conductor setups. The one for the masthead is to port of the mast step. The one for the steaming light (at least on my boat) is forward of the maststep.
Sailing isn't a matter of life and death. It's much more important than that!