My printer is a Pixma MX715, so not the same. But is has a heavy scanner unit (with ADF) which has to be held up in order to replace ink tanks underneath. When you lift it up a lever swings down to act like a prop. So the lever is only attached at the pivot and you would not notice it was missing unless you wanted the scanner to be held up. Also the design is not the same as your photo. Worth checking?