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It might be working but I don't know what keys will rotate it on screen. the setup has changed what keys affect each axis.

Yes. The 3 axis setup works fine.
Joints
0=X
1=Y
2=Y
3=Z

Just to confim its not my repository, I just made existing repositories usable as easy as we could and joined some dots...
I started this because I was trying to install into Debian 11 and the old code repo was no longer maintained (it had moved).
The Etherlab team who provide the Ethercat master published their own repository
Then they got permission to add the ethercat-linuxcnc hal driver to that repository
Then Scott Laird got permission to take over management of the Ethercat hal driver and added a lot of extra drivers
Following that I made some introductions and now Scott's hal driver has a Buildbot that pushes any changes across to the Etherlab repo so everything is kept up to date in one place.
The cool thing about all this is Ethercat is available to Linuxcnc without Linuxcnc hosting anything which it cannot do due to licencing restrictions that require licencees of Ethercat be a registered company.

Finally, because I built the 2.9.x installer, I preinstalled the Etherlab repository into apt in the ISO on our downloads page.

So the easiest path to install Ethercat is to install the Debian 12 ISO and follow the sticky which is loosely Rod's repo install.
Now if you are using another Operating System or Linuxcnc 2.10, I wrote a script on this sticky which should set up apt on your system and install Ethercat.
forum.linuxcnc.org/ethercat/53785-instal...thercat-repositories

Upload the current files.
Just to be sure, that is a 4 axis/ 5 joints machine where Y axis is tandem?

To the left of the ribbon cable, are those optocouplers?
If yes, see what wires go to those optos inputs, those should be step, dir, and maybe enable, one is ground, and for testing you only need 1, the step pin, and if used the enable, but if the drives lock when powered on, then skip enable as they are enabled, so use a signal generator or parallel port, or a small crappy transformer that outputs 3 to 6V AC, should be enough to check if they work, and if they do, leave them on.
Be aware that some older drives use two inputs as step and have no dir at all, so steps on one pin turn the motor one direction, while steps on other pin move motor the other direction.
There are also "quadrature inputs" using steps on both pins, but 90 degrees between them, also no dir.
And as the last type, the 4 input ones, so when testing if the motor does not turn but just vibrates in place, check other pins, there should be 4 that cause the motor to vibrate.
All of those can be controlled by LinuxCNC, even through a parallel port, hence my hesitation to change the drives.
But if you think the time is more valuable, do change them.
And if the motors turn out to be 5 wire ones, they can be changed to bipolar, just require a bit of time and a soldering iron.
BTW, never ever remove the rotor from the stator on stepper motors, that will render them useless as they will de-magnetize.

Prototype boards arrived.