Nasdaq posts the identity of major shareholders, but I haven't seen any identity info for shorts. I may just not know where to look.
Baring reliable information to the contrary, I believe the main resources shorting Tesla are the very big interests - Big Oil, Legacy Auto, and perhaps even deep state interests who can only continue to survive on 'business as usual'. The $billions in short interest losses are insignificant to some of these entities compared to profits they have realized in the past, and hope to win by 'disrupting the disruptor'.
However, you can't fight reality. The future is the future, the past is the past.
There is no requirement to report short interest holders, so we have no way to be sure who is behind that $10 Billion... But yes, your theory lines up with Jack's. (See my previous post.)