xstar dragon VP4 plus charger help

Hi
I have a xstar dragon VP4 plus charger and all works great today I have got a Lipo 7.2 volt battery and I think my Dragon will charge it but I don’t know what kind of connector cable i need to plug into the charger from my battery

I obviously don’t want to plug in the the wrongly wired cable and connector so can you please advise me what i need to fit into my charger