Knockout components click event from parent

Question

Lets assume that i have a modal, where there is a FileUpload component in the modal-body made from jquery-file-upload.

This component has a method called "Upload" in the viewmodel, which goes through selected files and uploads them.

Now, I want to upload the files when i press the "upload"-button on the modal. Which is the best and cleanest way to make this happen ?

My code right now is like this (be aware that it's just some quick prototype code):

<div data-bind="component:{name:'FileUpload', params:FileUpload}"></div>

<button data-bind="click:test">test</button>
@section Scripts
@Scripts.Render("~/scripts/global/fileUpload")
@Styles.Render("~/Content/css/fileUploadCSS")
<script type="text/javascript">
    var model = function () {
        var self = this;
        self.FileUpload = {
                url: 'test',
                onFailed: function (e, data) {
                    console.log('failed')
                }
        };
        self.test = function () { console.debug(self.FileUpload) }

    }

    ko.applyBindings(new model(), document.getElementById("main"))
</script>
End Section

And the component itself:

ko.components.register('FileUpload', {
viewModel: function(params) {
    var self = this;
    self.files = ko.observableArray();
    self.template = params.template;
    self.multiple = params.multiple || false;
    self.progress = ko.observable(0);
    var acceptFileTypes = params.acceptFileTypes || /(\.|\/)(gif|jpe?g|png|pdf|eps|tiff|cdr|PDF|CDR|JPG|EPS|TIFF|pptx|docx|xlsx|ppt|doc|xls)$/i;
    var maxFileSize = params.maxFileSize || 104857600;
    self.Upload = function() {
        $.each(self.files(), function(index, file) {
            file.submit();
        });
    };

    self.options = {
        type: params.type || "POST",
        dataType: params.dataType || "json",
        formData: params.formData || {},
        url: RTC.SiteUrl() + params.url,
        sequentialUploads: params.sequentialUploads || true,
        dropzone: params.dropzone||$(this),
        autoUpload: params.autoUpload || false,
        forceIframeTransport: true,
        limitMultiFileUploadSize: params.maxFileSize || maxFileSize,
        maxFileSize: params.maxFileSize || maxFileSize,
        done: function (e, data) {
            if (params.onUploaded)
                params.onUploaded(e, data);
            RTC.Progressor.Done();
        },
        fail: function (e, data) {
            if (params.onFailed)
                params.onFailed(e, data);
            RTC.Progressor.Done();
        },
        start: function(e,data) {
            RTC.Progressor.Start();
        },
        progressall: function(e, data) {
            RTC.Progressor.Set(data.loaded / data.total*100);
        },
        add: function (e, data) {
            //if (data.originalFiles[0]['size'] > maxFileSize) {
            //    RTC.addAlert(RTC.translate(220, "[220: File is invalid]"), "alert-danger", RTC.translate(193, "[193: An error occurred]"));
            //} else if (!acceptFileTypes.test(data.originalFiles[0]['name'])) {
            //    RTC.addAlert(RTC.translate(198, "[198: Wrong file format]"), "alert-danger", RTC.translate(193, "[193: An error occurred]"));
            //} else {
                self.progress(0);
                if (!self.multiple)
                    self.files.removeAll();
                self.files.push(data);
           // }
        }
    };
},
template: { element: "fileUploadTemplate" }
});

ko.bindingHandlers.fileUpload = {
update: function (element, valueAccessor) {
    var options = valueAccessor() || {};
    //initialize
    //.fileInput || $(this),
    $(element).fileupload(options);
    ko.utils.domNodeDisposal.addDisposeCallback(element, function () {
        // This will be called when the element is removed by Knockout or
        // if some other part of your code calls ko.removeNode(element)
        $(element)("destroy");
    });

}
};