How Should I Link Pololu Step Driver with Arduino LCD KeyPad !

Other Hardware Displays
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How Should I Link Pololu Step Driver with Arduino LCD KeyPad ? Which Legs should I Use When I Use Pololu step Driver ?

Thankyou.

LCD KeyPad
http://www.sainsmart.com/sainsmart-1602-lcd-keypad-shield-for-arduino-duemilanove-uno-mega2560-mega1280.html

Step Motor Driver