Servo Controller Shield for Spider Robot Controller

How do I connect power source to Servo Controller Shield and Spider Robot Controller? The screw terminals on the shield are marked "IN+" and "5V_OUT". How should I connect the servos to the shield? There are no instructions for the shield.

I connected a 6V battery

I connected a 6V battery pack to the screw terminals on the Spider Robot Controller and a 7.2V battery pack to the screw terminals marked “IN”. I think that the screw terminals marked “5V_OUT” isn’t connected to any pins on the Servo Controller Shield.