Its nothing but some other guys saying they noticed the same thing,Â
https://forum.audiogon.com/discussions/anti-skating-sme-v that twisting the wires affects anti-skate. I would just search around using terms like SME 312S tension spring, schematic, manual, etc I’m at work where we are stuck with the Goolag and its censored search results but maybe you can use Duck Duck Go or one of the other legit search engines to find what you’re looking for.
Unless its so far off its resulting in mis-tracking then anti-skate really isn’t all that big a deal. If you can twist that wire enough to get by I would just go with that. If not then it shouldn’t be all that much in the way of tools to take it apart enough to figure out what’s going on. It works by spring and filament. Odds are the filament either broke or came off whatever its supposed to be stretched across and that’s why its not working.