In order to get your audits and observations pinned on the map view, you need to define the coordinates of your sites in the domain management.
How to add coordinates to domain?
Choose "Management" > "Domains" in the portal. Then choose the reporting site you want to add the coordinates from the domain tree on the left.
You can define the coordinates in two ways:
1) Just press the "Use my location" and your current location will appear to the map. You find this button below the map.
2) Fill in your site address and press "Use address coordinates" and coordinates based on the given address will appear to the map. Also this button can be found below the map.
If you want to adjust marker's location, you can drag it to right spot.
After you are done, don't forget to save the changes to the domain.