...$ tar -xOf 010a-e3614234-218f-4666-9609-22b1e5743db6-2022-07-03T10-00-00Z.tar.gz settings.management.cattle.io#v3/server-version.json | jq .value
"v2.6.6"
Fun walk down history lane. Prints the versions of rancher backups found in a dir, from settings stdout.
find restore/backups/ -name '*.tar.gz' -exec tar -xOf {} settings.management.cattle.io#v3/server-version.json \; | jq -r .value