This is a Hyperion Output Harness, and is intended for use with 2S LiPo Battery Packs. EOS Output Harness for Balance Charging 2S Car Packs such as ORION, TRAXPOWER, and Hyperion SWIFT Hard Case RACE packs. Fits EOS balance Chargers (EOS0403i, 0606i-x, 0610i-x) and LBA10. Battery-side has 4mm main bullet connectors, plus 2mm bullet for balance port on battery.
Because long wires and extra connectors in the balance circuit can potentially reduce accuracy of charging and balancing, this harness in made to connect directly to the Balance Port on Hyperion balance chargers. However, if you prefer (or need the extra length) you may use the Hyperion multi-adapter which came with your EOS charger and plug this balance connector into the 6S port on the Hyperion multi-adapter.
If you have a charger which can charge 3.7V LiPo batteries, but does not have a balancer built in, you can use a Hyperion LBA10 Balancer between your charger and this harness, to balance charge your 2S Car pack.