In this photo the panel is set in place. It’s a little difficult to photograph the inner cleat but the strip of timber you can see on the upper side of the rear of the panel has a corresponding 45 degree cut to the one attached to the layout. the panel simply lifts off when it needs to be removed. I can assure you that the panel itself is extremely secure attached like this. The electrical connection to the layout is made via more DIN plugs and sockets, the wiring doe the two needed you can see in the photo.