How do I create transparent tiles on my tile server with only labels as layer over my sattelite layer?

I currently have a satellite tile server based on an mbtiles file, and I also have a normal openstreetmap tile server with the normal carto styling. But I want to make my openstreetmap tiles as a layer over my satellite layer. So I guess I need to change the style.css of my osm tile server so it only contains labels so I can use it as a layer over my satellite layer. However, I can't really find any concrete examples and I can't find my way in the carto styling as it really is complex. So are there any carto styling "templates" which I could use so that my tile server only offers transparent label-only tiles? Or is there another (easy) way to just have "label" tiles? My satellite tile server is running with [https://github.com/maptiler/tileserver-php][1]. My OSM tile server is setup using the following tutorial: [How to Set Up OpenStreetMap Tile Server on Ubuntu 20.04][2]. [1]: https://github.com/maptiler/tileserver-php [2]: https://www.linuxbabe.com/ubuntu/openstreetmap-tile-server-ubuntu-20-04-osm