How do i recharge my kingman spyder 9.6v paintball battery?

http://www.criticalpaintball.com/Kingman-Spyder-Rechargable-9-6V-Battery-Charger-p/spyder_batterychargercombo.htm this is the battery i have and there are no holes or ports on the battery that are visible at least.... the part you plug it in with the two circles, do i pull that off to plug it in? im not sure on what to do, please help me! the link is the same battery that i have