Shortage of small screws for servo

I assembled the servo (http://www.dexterindustries.com/shop/servo-package/) and sensor for GoPiGO following the web manual:
http://www.dexterindustries.com/GoPiGo/getting-started-with-your-gopigo-raspberry-pi-robot-kit-2/1-assemble-the-gopigo-2/assemble-servo-package-assemble-the-raspberry-pi-robot-servo-kit-with-the-gopigo/

The problem is that I found only two small screws and some large screws (http://www.dexterindustries.com/wp-content/uploads/2014/07/GoPiGo-Servo-Assembly-for-the-Raspberry-Pi-Robots-14.jpg), but I guess three small screws are needed to attach the servo as this image:
http://www.dexterindustries.com/wp-content/uploads/2014/07/GoPiGo-Servo-Assembly-for-the-Raspberry-Pi-Robots-21.jpg

How can I solve the problem?
I have a plan to buy one more GoPiGo, so please send me short screws with it.

Thanks,

So were there no small screws with nuts? There should have been a set of machine screws (the pictures you show are wood screws) for attaching the sensor to the servo controller. Were there none in your package?