level = lever in above post.
Ebay pic is even earlier version.
The lever is screwed into the hole and many levers have a "crimp" spot to make easy to tighten w/ small wrench. Other levers have bigger end so use that to tighten. Can be hard to remove because many use "loctite" at factory or threads have rusted.
Many times these metal switches can be fix. Depending what/how fix may not last long but better then nothing while looking for replacement.
Don't solder. Many are "pot metal" and melt easy or aluminum most solder won't stick. plus heat to solder will wreck many plastics.
[This message has been edited by theogre (edited 10-25-2020).]