Wait until you get the charger, it will have instructions, and it may come with something like this:
http://www.modelsport.co.uk/core-rc-...products/32048
or:
http://www.modelsport.co.uk/logic-rc...products/32574
jst-xh or jst-eh small white balance connector, these cables are for charging/balancing stick packs, extra bit required for saddle, confusing at first but you will get there.