BiPolar stepper motor works with only 3 wires instead of four

What is this, shown in your first photo? Where do the wires from the screw terminals go?

Sorry two latest pics are recent. I burned the L9110 driver. So i'm using the ULN2003.

Gotcha so it's strictly a unipolar stepper motor that can drive this?

How'd you find this photo? I assumed 5v was the first 2 pins (-,+) and the next two are 12v pins with ground on the left and power on the right similar the to 5V output pins.

the bipolar stepper motor.

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