The little white connector is the balance lead, that tells the charger what voltages the cells are at.
Before you even think of charging anything, read the manual which comes with the Turnigy charger, it's not perfect but will give you a good idea of what to do.
Then read this: http://www.rcgroups.com/forums/showthread.php?t=209187
You'll want to charge that battery at 2.6A, you could most likely charge it at more then that, but at that level it will last the longest (and be safer).
When it is finished charging it will be at 8.4v, if it is a 7.4v LiPO.
Oh and personally I always charge on the balance setting, it's a bit slower but if you're not in a rush it's the best way to do it.