We need to back up.
This is not how the stepper motors should be wired. This is called “parallel” and 1) You can run the stepper wires straight to their own drivers with the skr pro and 2) If you want two steppers to go to one driver, then you need series wiring.
The instructions and diagrams for wiring are here:
I am worried things still aren’t wired right.
To connect to the skr pro, you can use cnc.js, or repetier host, or pronterface, or octoprint. I have used them all and they all should work. There shouldn’t be any guessing. There should be a lot of chatter between the skr and the software. If you can share some of that, we can see what is going on.
It might beep once or twice when it connects, but the messages it prints may also give us a clue as to what is happening.
I honestly can’t tell which of these symptoms is still happening.