Three wired plug is the balance lead

The other two are discharge (main) battery leads wired in parallel

They are just giving you two options for connecting it (white micro plug and servo / rx type)

You need to connect one of those two to your charger main port and the balance as normal

You will need an adapter or multi charge lead if you dont own one, something like this

http://epbuddy.com/index.php?main_pa...products_id=80

Or you can just cut one of the plugs off (the one you dont need) and use whatever you normally use on your charger (TRX / Deans etc...)

Cheers