The Yak-Power Power Adapter Kit is for use only when using the Power Pack battery box (sold separately) atop a kayak to reverse power through a Power Port (sold separately) to a Power Panel switching system (sold separately) stowed away inside the hull. Positive terminal can be exposed when using the kit, so always connect or cover the accessory side of the adapter first, before connecting to the battery, and disconnect battery side first when disconnecting. Includes polarity-correct Pass-Through cable for plugging the Power Pack battery box into the Power Port and polarity-correct Gender-Change Adapter for connecting Power Port wire to the Power Panel switching system. Warning: All Yak-Power plug-and-play accessories are specifically designed to work together while maintaining the correct battery polarity throughout the entire Yak-Power system. Use of other connectors or splicing other connectors into the Yak-Power system may cause damage to the system or to the accessories connected to the system and void your warranty. CAUTION: Always pay attention to the actual wire colors of all Yak-Power accessory cables to ensure that the Red (+) wire is always connecting to the Red (+) wire on the connector into which it is being plugged. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Power Adapters.