Tailgate actuator stuck in locked position

[Bigricksstg]

The tailgate lock actuator is dead and stuck in the lock position. This model year does not have the cable inside to manually unlock and open the tailgate. I have exposed the actuator but cannot figure out how to open it. I called the dealership and they said that in these models you have break open a plastic panel (the whole thing plastic) to expose the cable to open it. Does anyone know where this panel is as there is not an apparent panel that I can see. I don't mind breaking something off since the part is dead and needs replaced anyway. I just can't figure out how to unlock/open the tailgate. Any help is appreciated.