Index (with screenshot/image) to Google Document Copy
Select and copy all the content of the index from the beginning to the end of the last screenshot.
Now paste the content into the google document.
Now click on the image and right-click to copy the image.
Select the image broken box and paste (Ctrl + v) directly to replace the box with an image/screenshot.
Repeat steps 3 and 4 till all screenshots/images are copied into a google document.