On the Chinese machines that I have worked on, there is a GX16 two-pin jack on the control box that is labeled "Knife". That is where the touch plate wires go. I'm not sure why the label it "Knife" instead of "Probe" but it might be labeled something else on your machine. On your machine it might be a different type of jack, the ones I have seen are the GX16 two-pin jack. Hopefully, you will have a jack to use.
If you do have a GX16 two-pin jack you have 3 options:
1. Purchase a GX16 two-pin plug to use on the touch plate. You will have to solder the connector. This is what I recommend. I might have one in inventory I'd have to check but they can be found on Amazon.
2. Replace that jack with a different jack like a phono jack and use a phono plug for the probe wires. You will need to be able to solder the wires to do it right, don't short cut, do it right.
3. I really don't recommend this one but it can be done, and I have seen it done before. Pull the jack out and solder the wires from the jack to the wires from the probe. If you go this route use shrink tubing to insulate the solder joints. Remember, I really don't recommend this, there is a possibility of pulling a wire loose inside the control box and burning out the motion control board and your computer if it is connected at that time.
If there is not a jack for the touch plate on the box then the only option would be to open the control box and see what motion controller they used on that unit, they used a couple of different ones depending which one was cheapest when they built the unit. Of course, they may have used a different board in it than I familiar with. If you have to go this route, it will probably void any warranty you have on the unit. If this is the situation and there is an open input on the board it can be done. In this case, I recommend using a jack and plug for the probe. It needs to be a two-pin jack and plug pair. Solder the wires to the jack and plug, the connections to the control card are screw terminals.
Let me know what you have