This paper continues to discuss the coupling characterization of multiple wires of arbitrary dimensions in terms induced on currents on them enclosed in a rectangular cavity. The formulation of this problem also makes use of the Fourier Series method to compute currents induced on each wire. In the thick wire approximation, the current is still assumed to reside on the wire axis, but the boundary condition is enforced on four generatrices spaced around the circumference of the wire. Selected numerical results are included for a variety of diversified situations in the cavity environment.