Just thought these boards are common +5v so the pulse stream is triggered to ground, which to my mind at least is a better way of connecting.
As an aside for quickly checking beakout boards without setting up drivers and motors,use an earbud or small speaker ,i use a piezo transducer,
and connect the pulse output stream to your speaker,you will hear it buzzing at different frequencies (according to feed rate) if all is well.
just incse here is the xlm file i tested on, im running on windows 7
Tony