A cable drum assembly for a power drive assembly for a vehicle sliding door, the cable drum assembly comprising: a first drum configured for use as a front drum or a rear drum of the cable drum assembly, the first drum having a first plurality of locating holes; and a second drum configured for use as a front drum or a rear drum of the cable drum assembly, the second drum having a second plurality of locating holes, the first plurality of locating holes have a first pair of locating holes configured to align with a first pair of location holes of the second plurality of locating holes when the first drum is used as a rear drum of the drum assembly and the second drum is used as a front drum of the drum assembly and the second plurality of locating holes have a second pair of locating holes configured to align with a second pair of location holes of the first plurality of locating holes when the first drum is used as a front drum of the drum assembly and the second drum is used as a rear drum of the drum assembly.