::I agree there are difficulties in interpreting the position of the N. in region 2. This is what Capdeville tried to cope with. 

 ::I wish to attract your attention to the following points which might help in making things clearer: 
 ::1) The councils of Iupiter are 2, not 3. Consentes Penates consensiones(1) and involuti, superiores or Novensiles, Favores O.(2). Sources are clear about this. Arnobius III 38, 39 (44), 40; Martianus I 41 and 45; Festus sv. Manubiae; Seneca NQ II 41 etc. Iupiter has no advisory council in region 3 as he need not one: he may throw the mildest fulmen consiliarium of his own accord. Secundanus means precisely that he is here in his most favourable attitude. I do not see why you talk of 3 groups (the Favores Opertanei being considered equal to the superiores involuti Novensiles by C.). 
 2) I have a personal hypothesis concerning the inversion of positions of Consentes and Novensiles. Namely the Consentes are the Penates Iovis so they must reside in his own domus: as you know the Penates are the gods who make anybody exist: the Etruscans knew 4 kinds: Iovis (heavenly god's), Neptuni (earthly god's), Plutonis (underworld's god) and man's. So it is necessary for them to reside in region 1. The Novensiles on the contrary are in region 2 since this is the place praeter domum Iovis, quod etiam sublimis est i.e. Martianus wants to make it explicit they are located outside the house of Iupiter. Varro says somewhere the number 9 is the most powerful and belongs to the highest heavenly position. Thus they are both outside as N. and inside the house of Iupiter as Favores O. 

 ::Lastly I wish to remark that C. is not a correct scholar. He omits to acknowledge Dumezil already suggested the identification of the 2 councils  concerned with lightningbolts with the Consentes Penates and Favores Opertanei (the last for the most destructive manubiae) in ARR appendix. Moreover he does not cite A. Grenier's identification of the same most powerful council with the Novensiles in the famous article I used. Please cf. my former contribution above.