A planet, house cusp or MC or ascendant, in the same degree (exact degree) of the nodes, indicates a the special influence of karma (or Fate, if you rather use that term) upon that planet or house of MC or ascendant; since the ascending degree relates much to the essence of the personality, this would indicate a special powerful influence of karma/"Fate" upon the essence of the person: look at the SN to determine the karma/"Fate" or "lessons" that need to be overcome, or learned, and look to the NN to determine where this life will lead you, spiritually and upon an evolutionary level, ie, where you will "going"...
In the reference chart, there is no square involving the Nodes and the ascending degree because they are seperated by more than 1 degree (ie, it is not exact, which exactness-partile state-is necessary for there to be any effect)