Where To Hang Hold Backs When Using Those Braided Rope Thingies (technical Jargon) To Hold Back A Curtain Where Should It Be Placed?

When using those braided rope thingies (technical jargon) to hold back a curtain where should it be placed? - where to hang hold backs

Of course, the rope curtain toured horizontally and adheres to a cup hook to engage. What I ask here is, from top to bottom of the window, where the strings are placed on traffic? This should be a rule of this kind or another. Maybe could get an interior decorator, to save me? Is there a specific angle of the rope they hang Cup? or if the rope is taught and the strength to pull the curtain and look ... even if a bit forced?