Hi
To add another template module style file needs custom works in the PHP, CSS and JS.
You have to copy the file from JA Oslo template folder to JA Uber
/Html/mod_articles category/slideshow.php
Now open the js folder from JA Oslo and copy the swiper js files into JA Uber.
After this open assets.XML file defines the js file in it.
Now create a module and published it, It does not have any style so you need to use firebug to inspect element from browser and copy style from the JA Oslo slideshow module and apply it on JA Uber articles category module with help of custom.css file.
This will take the time to create a new style for the JA Uber template.
Regards