Here are the pictures of my screen door panels.
This picture shows the upper screen panel.
This is a picture of the bottom panel.
To remove the panel, I just put my hand between the screen door and the panel to separate the velcro strips.
This is the removed top panel. The white bands are the velcro strips.
This is the matching velcro strip on the screen door for bottom of the upper panel.
This picture shows the upper panel in place and fitted so that it fits inside the seal material on the screen door.