Does the ONLY lock on the driver’s side not work mechanically ?

Hello to all Volvo-Gurus 😉 So, that’s it. Now my question…Did I manage to open a few kilometers with a friend’s V70 (I) yesterday and turn off the car, why I forgot to turn off the inside light, I don’t know. . So..nun kommts..so we wanted to open the car today…GING NIX…all the two remote controls zero reaction. Door lock is only one on the driver’s side, Koffreraum is only a small flap but behind it (could) one could often install a lock…but was not a … Just a plastic cap that has hidden the hole and we could not remove or wanted to remove. With the two locks at the one lock (driver’s side) I could reach after several times back and forth also nix .. IS THE NORMAL ?? For what is there the lock there at all, if one does not want it at such an incident or in the winter to the Bsp. If the battery could say goodbye or use similar with the power supply, I can use the lock side?