How to connect Ping sensor to this Motor shield?

Hy after i connect the 2 DC motors i want to connect 4 ping Sensor and i don’t know were to connect them. I’m a nooby at this plz help. this is the shield => <=

well the link says it all the pins other than 4,5,6,7 there is a lot more pins left you can easily use four ping)) sensors along with this sheild and looks like you didnt look closely i found this on the website itself :)

Thank you very much ! :D ;D