Pindac, You wrote, "If the OP wants to replace the Cable used for the PIB - 1, the method when used will add one more set of connections and disruption in the signal path." I beg to differ. He is already using the box, so changing the wires between the DIN plug and the box will not add physical connectors in the signal path. That will not change. However, by eliminating the box interface, then he can reduce the existing number of physical connections in the signal path.
I gather you have strong opinions on what kind of wire sounds best. So do many of us, but I think getting rid of the box is the main thing,