Add the following code to any template:
{template="widgetContainer" group="global" app="core" params="'your_name', 'horizontal'"}
Then edit the file:
applications/core/modules/front/system/widgets.php
We are looking for this code:
if( !\in_array( \IPS\Request::i()->area, array( 'sidebar', 'header', 'footer' )) )
And after the comma we add our name, example:
if( !\in_array( \IPS\Request::i()->area, array( 'sidebar', 'header', 'footer', 'YOUR_NAME' )) )
In this way, we can add our own place(s) for widgets.