I wondered about that, but I was able to take my Y axis endstop, and connect it to the Z axis pins and it worked fine. Showed open when it should and triggered when it should. So it appears to be something to do w/ these end stops. Not thrilled about it, but I'm going to order some endstops that match the Anet endstops I already have, and use those. If that doesn't work, then I don't know what I'm going to try.
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