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H546 Unipolar Stepper motor driver

Hi, ive been trying to make a steppermotor driver for 2 http://www.active-robots.com/products/motorsandwheels/stepper-motors/datasheets/103h546-0440.pdf

I have used a ULN2003 like this:

(the second motor is in 5, 6, 7, 8 (I have a bigger ic)

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Vary basic question about headers

This is a very simple question and I am only asking because it is fundamental to my first robot (and I don't have the money to get this bit wrong).