A cable guide assembly adapted for use with a guide rail for a motor vehicle, for redirecting a cable of a window regulator, includes a cable guide formed with an outer perimeter and a cable guide receiving site formed in the guide rail adapted to receive and mount the cable guide. The cable guide includes a cable guide groove to guide the cable wrapping around the cable guide and a generally circular interior cavity to mount to the guide rail. In the cable guide assembly, the cable guide is securely engaged with a center support in the cable guide receiving site and rotatable between two rotatable positions, a temporary holding position and a final position. In the temporary holding position, the cable is at a first tension and the cable is at a second tension higher than the first tension in the final position.