The conductances of the single (a), double (b), triple (c), and quadruple (d) QDP chains versus the bias voltage eV for the nonzero couplings ε_M between η₁ and η₂. In these structures, the MBS is only coupled to QDP 1 with λ₁ = 0.5. The other parameters are chosen to be Γ^L,R = 0.5 and v_1,2,3,4 = 1. Also, t_1,2,3 are equal to 1 and λ_2,3,4 are equal to 0 if they exist in the corresponding geometries.