Yes, there will be. That will include your speaker wire. As well as for power windows and locks. But it is much smaller on cars with manual windows and locks.
If you remove the screw that holds the door lock to the door panel, it will come off. Then if there is not a plug from the door wiring harness that connects to the power door lock switch, then u either dont have power locks, or it is somewhere inside the door, if its there plug it up.