<p>The spontaneous cold quaternary fission of ³⁰⁶122 and ³⁰⁸124 isotopes is systematically investigated using the Coulomb and Proximity Potential Model (CPPM), with emphasis on the influence of deformation, orientation and nuclear shell effects on fission dynamics. Barrier penetrability and relative yields are evaluated for various fission channels within the cold reaction valley, considering fragment orientations at 0°-0° and 90°-90°. The analysis reveals that the maximum relative yields are consistently obtained at the 0°-0° orientation, where optimal fragment alignment minimizes the driving potential. For ³⁰⁶122, the highest yield of 14.68% corresponds to a channel containing the near proton magic nucleus ¹¹⁹In. Subsequent prominent yields of 11.85% and 9.37% are associated with channels incorporating the neutron magic ⁸⁸Kr, near doubly magic ²¹⁰Pb, and near proton magic ¹²²Sb. In the case of ³⁰⁸124, the maximum yield of 14.03% is attributed with the fission channel involving the near proton magic ¹²¹Sb. Additional substantial yields of 13.67% and 12.38% are obtained for the fragmentations containing the near neutron magic ⁹²Sr, doubly magic ²⁰⁸Pb, and near proton magic ¹²³Te. Reduced yields at 90°-90° orientation are observed for fragmentation channels involving the neutron magic ¹³⁶Xe, ¹³⁷Cs and near neutron magic nuclei ¹³⁷Xe, ¹³⁸Xe, ¹³⁹Cs, and ¹⁴²Ce. These findings underscore the role of nuclear shell effects and fragment orientation in determining the most favourable fission channels in the quaternary fission process.</p>