This is a TQ Wire 450mm 4S Hyperion Balance Extension. TQ Balance "charger specific" multi-extension cables use TQ's flexible triple black 22 gauge cable material to relocate the balance plugs, making it easier to balance charge a battery without removing it from your car. These cables are made to plug directly into the balance port of your charger. One end has your charger specific plug and the other end has both an XH connector (ProTek, SMC, Orion type) and a ThunderPower connector. These are 450mm in length and plug directly into the charger and eliminate the balance board.
NOTE: When using the 2204 Hyperion balance extension with the Hyperion HP-EOS0720i SUPER DUO3 charger you need to align the cable's plug with the right side of the charger port.