photos of the connections:
https://goo.gl/photos/Hf39fpj8rEDaW3h38
this is running explorer-hat-master/examples/test.py
the motor is this one:
https://www.adafruit.com/products/2941
it's not a stepper, just a straight motor and it powers just fine if i move my wires to 5v and gnd on the ehp.