If cluster-wide quorum does not exist, then you recover the cluster configuration by finding a configuration to use for recovery, re-creating the cluster, and then rejoining each node to it.
Restoring a cluster configuration from an existing configuration
To restore a cluster configuration from an existing configuration after a cluster failure, you re-create the cluster using the cluster configuration that you chose and made available to the recovering node, and then rejoin each additional node to the new cluster.