https://docs.typo3.org/m/typo3/docs-how-to-document/main/en-us/GeneralConventions/FileStructure.html#includes-rst-txt

Configuration

Minimal Example

Hint

If you want to work with Google Maps in TYPO3 backend you or an administrator have to configure the Google Maps API keys in extensionmanager to get a working environment.

Include static template Maps2 Default (maps2)
include one of these static templates Maps2 for Google Maps (maps2) or Maps2 for Open Street Map (maps2)

Update these properties in TypoScript Constant Editor:

plugin.tx_maps2 {
  persistence {
    # We prefer to set a Storage PID where the maps2 records are located
    storagePid = 4
  }
  settings {
    # If you're using Google Maps you have to set an API key to allow loading the map in frontend
    googleMapsJavaScriptApiKey = ABC123...
  }
}