Marinco Adapter 15A To 50A-S15504These high quality, ergonomically designed, one piece adapters have a built in LED power indicator, are Marine UL listed and are used much like Pigtail Adapters however, they do not have sealing collars and are not recommended for use in wet locations. Use only in an enclosed, dry location, such as powering your boat from a 15A power receptacle inside your house. Female connector (boatside) attaches to boat inlet or cordset. Male plug (dockside)