Bl M R (BC) resulted in an order of magnitude increase in conductance as compared to analogous non-radical molecule. While, the other configurations Bl M R (CD) promote, albeit rather small, but an increased conductance relative to its closed shell counterparts. We now examine the origin of conductance discrepancy and Fano resonances for the configuration Bl M R (BD). Figure shows the energies and spatial distribution of frontier orbitals of Au-Blatter-Au junctions obtained from central subsystem molecular orbitals. The orbital structure for the three radical configurations is energetically similar and is characterized by delocalized frontier orbitals involving α/β-HOMO, α/β-LUMO, α-SOMO and β-SUMO. For spin-up electrons, the three dominant transmission peaks (marked with red as I, II and III in Figure ), originate from HOMO, SOMO and LUMO (marked with red as I, II and III in Figure ), respectively. As for spin-down electrons, the blue resonance II lying close to the Fermi energy originates from SUMO (marked with blue as II in Figure ), while the other two blue peaks I and III located farther from Fermi energy can be attributed to HOMO and LUMO (marked with blue as I and III in Figure ). But above all, it is the SOMO of spin-up electrons and SUMO of spin-down electrons, lying in close proximity of Fermi level, that dominantly determines the junction transport properties rather than HOMO and LUMO. For Bl M R (BD), the spatial distribution of α-SOMO and β-SUMO (shown in Fig- ) explains it all. Here, these two orbitals are localized at one side of the molecule including the fused benzene ring B, triazinyl ring A as well as ring C, thus suggesting a strong coupling with one (say left) electrode. While, a node is observed on all the atomic sites of ring D, indicating that the other side is electronically decoupled from the second (say right) electrode. This indicates an asymmetric coupling of α-SOMO and β-SUMO to the electrodes. Thus, although the SOMO and SUMO lies very close to the Fermi energy, they result in a pair of weak resonances (marked as II with red and blue in Figure ). On the other hand, HOMO and LUMO (marked as I and III) are completely delocalized on the path that carries the main π-electron delocalization channel, thus delivering high resonance peaks, but they are far from Fermi energy to contribute to the T(E) around Fermi energy.