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That is exactly what you are seeing there. It works very well but I learned the hard way that running any high-current through there (in my case, the extruder) was a bad idea. Anyway, DB25 is more than sufficient for X, Y, Z, and Extruder motors, as well as end stops, a fan, and if needed a couple more sensors. The trick is to use a common ground for the end stops on the plug so that you can save a few pins.