From Google Slides, choose File > Share > Publish to Web

Select the Embed Tab

Choose the options such as Slide size, Auto-advance slides, etc.

Click on Publish

Copy code (ctrl + c or right-click on code and choose copy)

Toggle Edit mode to On

Select + Add an activity or resource

Click on Page

Type the Name of the page

Under Page content, in the text editor, click on the HTML button

Paste the code into the box

Click on the HTML button again and make sure your slides are showing in the box

Select any other settings you want on the settings page, such as Activity completion

Click on Save and return to course or Save and display