This is a standard size 5-pin XLR adapter, so I don't think it will fit a "mini" connector. Perhaps the curtain you bought is supposed to plug in to a controller box with that mini connector and then you can run DMX to the controller box.
Not a fault of the workmanship, but having a connector this long sticking out of your light board is dangerous, there's a lot of leverage there. A flexible, short cable that is 5 pin to 3 pin would be much safer for the equipment.
Once again monoprice delivers good quality for a great price. The build quality is of such close tolerance that I literally have never felt a connection so tight, precise and secure. We are using these for professional lighting needs and have full confidence in their performance. We obviously test everything before we put them into service.
PROS: Good price. Solid build quality. Works flawlessly.