[cptskippy]

There are adapters both ways.

CCS1 and CCS2 use the same communication protocol and Tesla adopted it for NACS in the North America market because they had to for the European market.

Older NA Tesla's can get a body module upgrade to support their CCS to NACS adapter.

It sounds like the adapter will be used at least initially to restrict which cars can use Superchargers. I would imagine this is partially due to the lack of payment terminals but also to prevent untested configurations of EVs.