Usage:

GeoCables Panel is located under the 'A-Tools' section of the N-Panel

Click the 'Create/Edit Cables' button to start the drawing mode.

Click on any face to place a point and keep clicking to add more points.

Hold down CTRL to snap the point to the center of the face.

Hold down ALT while clicking to split the cable.

With any GeoCable object selected click 'Add Shipped Connectors' to add the 5 connectors shipped with the addon to your cable.

Select any object and click the 'Object to Cables' button to convert all the edges of the object to cables.

For more controls, you can use the GeoCables modifier which is added to all GeoCable objects.