EO connectors are the best solution for an underwater electrical connection. This connector is constructed of a high quality, saltwater compatible flexible plastic. The connectors are gold plated and polarized to eliminate false connections. The use of this connector leaves no wishes open. It is easy to connect underwater even when using thick gloves, but it stays firmly together until you disconnect it. The cables with EO connectors are available in lengths up to 120cm. For the EO configuration you need 2 EO cables, 1 each for batterytank and lighthead.