Okay I tried to push in that black plastic cover on both cables, but neither snapped or moved and I pushed hard. The car does something really strange. With the car turn off, I can shift into any gear, but with the engine running I am not supposed to be able to shift into any gear unless the clutch is pressed down, but I can shift into 2,4, and reverse while engine is running.

What is the device that keeps the car from shifting into gear unless the clutch is depressed???