Here is a guide on how to use it.
Left to Right.
BNC - This goes to the needleholder. It needs an insulated path. I would just use a Ballet Ejector.
1/4 inch TS or TRS (?) - This is for the foot pedal. I think the Clareblend footpedal might work. I can’t find any documentation for this. My guess is any 1/4 inch TS foot pedal might work.
Banana (?) - Patient return, indifferent electrode, etc. The positive path for galvanic. It ships with a neat wrist thing, but I don’t think it’s necessary for it to work. I think this would work with just a regular salt-water electrode and sponge.
4 Pin Din (??) - Client interrupter button. It’s a thing that’s hand held to stop the current.
What I can’t tell is … would this still work without the interrupter? Let’s say, those four pins … call them 1, 2, 3, 4. Maybe the interrupter works by connecting pins 1-2, and 3-4, and … pressing the button breaks those connections. Then this machine would never work without connecting those pins.
I asked the AI, it says there are at least 30 unique ways to wire those four pins.
You can always try calling TES in the US, and ask Dr. Heimlich. He has a ton of used gear and may have seen this device before.
Good luck!