Don't connect the ESC to a charger EVER. Connect the battery to a seperate charger for cycling (charge and/or discharging). The Red plug (called a Dean's plug) is set to connect to your battery (Red is positive, Black is negative). The other wires connect to the motor. This is a "brushed controller so there are only two wires to the motor. It really does not matter which one is connect to which wire on the motor.

Hope this helps.