Solar Connector To Dc 5.5X 2.5mm Extension Solar Panel Adapter Cable * Easy to install Solar Connector to 5.5X2.5mm adapter cable. Solar male connector to the negative pole and the female to the positive pole * solar to DC extension cable, longer connection distance, convenient to connect to the solar panel and adjust the best position when charging * Compatible with all brands of solar panels and solar charging power generators * Each solar connector is waterproof and ideal for outdoor travel, RV, camper, trailer, boat, use