Issues with paper loader tray and paper evacuation tray

Hello!
We have an old Heidelberg GTOZ52 S offset printing machine that is having some issues with its loading tray and evacuation tray, as in they do not work anymore.

Edit: I have received more info about the machine issue. The loading tray should rise while loading paper in packets of 150-200, and the evacuation tray should receive some kind of signal from the sensors that tells it to lower itself by the same amount of paper. We think that the trays do not communicate properly between them and the whole process stops when printing starts because of that. Our technician would like to know the cable in picture 3 could be safely removed and re-coupled without damaging the connection.