node-red/packages/node_modules/@node-red/nodes/core/common/91-global-config.html

<script type="text/html" data-template-name="global-config">
    <div class="form-row">
        <button class="red-ui-button" type="button" id="node-input-edit-env-var" data-i18n="editor:env-var.header"></button>
    </div>
</script>

<script type="text/javascript">
    RED.nodes.registerType('global-config',{
        category: 'config',
        defaults: {
            name: { value: "" },
            env: { value: [] },
        },
        credentials: {
            map: { type: "map" }
        },
        oneditprepare: function() {
            $('#node-input-edit-env-var').on('click', function(evt) {
                RED.actions.invoke('core:show-user-settings', 'envvar')
            })
        }
    });
</script>