Weather Proof Anderson SB50 Male Cover - by Trailer Vision The original version, not the rubbish from Asia. A true world first – the all new power connector covers from Trailer Vision have been designed for safety and protection of power connectors when used in mobile environments. The intelligent design of the covers ensures that mating power connectors are locked in place by a unique locking tab system to secure a safe and reliable connection for towing, battery charging, marine and industrial OEM applications.