How do you release rear double seat when when cable is not connected? on 2004 Mercedes-Benz ML350

Apparently a box of Kleenx caused a cable to be disconnected when the double rear seat was lowered. How do I release it?

Asked by for the 2004 Mercedes-Benz ML350
try a long screw driver to reach lock assm
Thanks for the advice. I did not have a long enough screw driver but used a narrow steel ruler. It worked!!