Well I successfully jumpered the Makerbase DLC 2.1 single Y axis pinout to two stepper controls. Worked like a flippin charm and I’m up and running. Thanks for the info! Honestly I wonder why I don’t see more people opting for this board over the typical Arduino Shield GRBL thing you see everywhere. The Makerbase board has pins for laser and probe which is super handy for a $20 board. Bought a cheap probe on Amazon and don’t have to do the paper method ever!
Top two stepper drivers in this pic are my two Y axis controllers - you can see they’re wired together on the control side.