The following pictures show a fully wound cable for the KSU unit on the left and the MSU unit on the right
First, I will mention that for both units the cable should extend approximately 7.5 inches below the level of the movement plate. Realize that it is not possible to get each of the cables at exactly the same length, but once the pulley is added differences of a half inch or so will not be noticed by most people.
Next, note that with the KSU on the left the driving stop attached to the winding arbor has a single dimple. It is between the two dimples of the driven stop. That is the fully wound position. The MSU on the right has standard designed stops. The driving stop on the winding arbor has a long projection. The driven stop has equal length teeth, but has two shallow and adjacent shallow indents. It is not obvious from the photo, but the direction of rotation of the winding arbor is counter clockwise. Looking at it from this vantage point, when it is fully wound, the long projection needs to be on the most counter clockwise or left hand valley of the driven stop.
Following these rules will allow for easy setting of the stops.