Welcome.
The THC installation manual on the main site contains this information.
https://www.langmuirsystems.com/thc/guide
If you search razor weld wiring in the magnifying glass up above there is many topics covering that scenario.
This topic happens to be pinned to the top of the forum.
You will not need Arch okay to move.
Two pairs of wire
one pair spliced into the trigger of the razor weld torch
One pair right to the lug nuts where your main clamp and main torch lead enter the razor weld which are for measuring raw voltage for the THC