In Knockout 3.3.0, how do I specify the new sync param when registering components via the "single AMD module" pattern?

gistfile1.js

/*
 * How to use the sync param when registering components via AMD?
 */
 
// In the register call?
ko.components.register('module', {require: 'path/to/module', sync: true});

// Or in the module's return value?
return {viewModel: Model, template: htmlString, sync: true};

// Or does this not apply to AMD loaded components at all?