templateurl file in ui-bootstrap-tpls.js

that file is coming from the $templateCache. From Angular docs:

The first time a template is used, it is loaded in the template cache for quick retrieval. You can load templates directly into the cache in a script tag, or by consuming the $templateCache service directly.

Adding via the script tag:

This is the content of the template

Note: the script tag containing the template does not need to be included in the head of the document, but it must be a descendent of the $rootElement (IE, element with ng-app attribute), otherwise the template will be ignored.

Here's an example:

angular.module('template/components/login.tpl.html', [])
    .run(['$templateCache', function($templateCache){
        $templateCache.put('template/components/login.tpl.html',
            '<div class="row">' +
                '<div class="col-md-4 col-md-offset-5 col-xs-12 col-xs-offset-2">' +
                    '<div>' +
                        '<label for="email">Email:</label>' +
                        '<input type="email" id="email" ng-model="user.username" class="required" name="email" autofocus />' +
                    '</div>' +
                    '<div>' +
                        '<label for="pwd">Password:</label>' +
                        '<input type="password" id="pwd" class="required" ng-model="user.password" name="pwd"/>' +
                    '</div>' +
                    '<p>' +
                        '<button id="login" class="btn btn-default" ng-click="onSubmit(user)">Login</button>' +
                    '</p>' +
                '</div>' +
            '</div>');
    }]);

I would reference 'template/components/login.tpl.html' as my templateUrl