Hypertherm PMX 900 Raw Arc location

I am trying to hook up a LS- THC. Does anyone know where or even better have a diagram as to where to connect the raw arc voltage on an old but very functional Powermax 900. The unit has pilot arc. I do not have the cpc port and the kit to add it is long discontinued.

Welcome to the forums.

Here is the link to the service manual.

This is where I’d start to look