Setting cipher suite via API

When you haven’t customized the list of allowed ciphers for a custom hostname, the GET API for custom hostname details returns an empty settings block where the ciphers would be listed: "settings": {},

If I want to set the allowed list, do I need to fill out the entire block like shown in some of the examples:
"settings": { "http2": "on", "http3": "on", "min_tls_version": "1.2", "tls_1_3": "on", "ciphers": [ "ECDHE-RSA-AES128-GCM-SHA256", "AES128-SHA" ] },

…or can I just set the ciphers array in that block, like this?:
"settings": { "ciphers": [ "ECDHE-RSA-AES128-GCM-SHA256", "AES128-SHA" ] },