you will have to use the aruidno servo library to have the arduino generate PWM signals. As seen here,
http://playground.arduino.cc/ComponentLib/servo
you would have to attach the black wire(from victor) to any ground pin.
Then the white to an arduino pin with PWM(i think its has a curvy line next to pin number label.)
Then the red wire you have no use for.
so a simple sample:
#include <SoftwareServo.h>
Servo myservo
(any name can be put here this example uses myservo); // create servo object to control a servo
// a maximum of eight servo objects can be created
void setup()
{
myservo.attach(9); // attaches the servo on pin 9 to the servo object
}
void loop()
{ myservo.write(0)
(writing the servo at value of 0 will spin motor full speed coutnerclockwise. and a value of 180 will spin motor to full speed in clockwise direction. and a value of 90 is no spin or stop) }
I will assume you know how to wire the battery to the victor.
the sample code is not perfect there are mistakes. but i hope it helps.