Not sure of the mini either myself. Do know the Velocity V2s (some suggest these are Velocity minis) have a tiny grub screw in the positive contact pin you remove to open up the screw as a capillary screw (squonk pin). You need to turn the atty upside down and put a real little square or Phillips screw driver into the hole in the center of the positive pin. Turn, eventually you'll find yourself backing out the tiny grub screw. I forgot doing this even after reading about in the product description a few times. *chuckles* "Gee, not getting any juice What the?"
It should work with the Dripbox, but you'll need to ensure you open the capillary screw.