Blender-osm Image Overlay URL

I know that might sound like a silly question.
I was building a city in Blender using Blender-OSM. But instead of using “ArcGIS” and “MapBox” tokens, I decided to use “custom URL” overlay. But what’s the URL? (What does he mean by URL) and how can I get a URL of a map overlay? Thanks in advance!

Maybe this…

Alright! Thanks Thanks Thanks!