Rotary/Y driver help

Ok, so this is my Y driver. My rotary is somehow connected to this. So when I want to use my rotary, I don’t have to unplug anything. I just turn power off, plug in rotary to an 8 prong plug in my laser bed, and then turn the power back on and my laser recognizes it. I don’t know where that plug comes into this driver.
Is there a way to buy a new rotary and connect it to this driver?

And there is a plug that goes in that right slot. I had it unplugged to look at the connection