Go to your saved locations and click the "Text Search" button, then toggle the platform selection to Apple Maps. After that, search for the business location by its name or address and click on it to instantly add it to your Saved Locations.
Alternatively, you can search for and add an Apple Business Connect location when setting up a new Map Scan to run. Just click the "Search" button at the bottom of the locations drop-down to pull up the same text search box described above.