Setting up a MySLP account, adding locations, setting up a SquareSpace account, adding the map, and deploying a site can take as little as 15 minutes.
Add a new page to your site using a blank template.
Give the page a title.
Add a block.
Choose Embed as the block type.
Use the HTML insert option for the embed.
Copy the snippet to your clipboard.
Paste it into the embed box on Squarespace.
Save the embed.
Apply the block to the page.
Save the page.
You now have a SquareSpace map.