https://www.embedgooglemap.net/
For RVsitebuilder use the Section>Contact>Google maps. The top selection.
Get the embed code:
- Go to Google maps. In the Search Google Maps text box, type in the address of the location you want to display on your web page.
- When the map appears, click on the Share icon.
- Select the Embed tab on the Share window.
- Click on Copy HTML.