How to populate a Splitscreen Snippet

I’ve been through number of video ‘how-to’s’ for PM 5,and I’m at a loss on how to get images into the Splitscreen. I can load the snippet in the storyboard,but I cannot see how to load images in to each frame on the stage. I have the images in the storyboard. Thanks for your help, I do like this program.

fist drag in the snippet, then dran the images onto the placeholders in the stage from the photos sidebar.

Thanks, I was drawing from the Storyboard.