That cable is part of the regulator. It gets wound up inside the black part that attaches to the window motor. Not a serviceable part.
If the motor is still working fine then all you need is the regulator assembly. If you do buy a new regulator with a motor, be sure to test it once you get it installed BEFORE you put the door panel back on as some of the aftermarket motors are wired backwards so you may need to remove the wires from the harness end and flip them to get the window to move correctly with the switch. There is a small release tab inside the harness end that you can get with a pick. Then they just snap back into the plug once you push them into it.
