In general the transmitter RECEIVER conductors were green and white on the original "simple" desk stands, the 20AL, 40AL, 50AL, and 51AL.
For the upgrades, as well as other modifications, colors often changed, depending on the designations of the hook switch contacts, so that a YY terminal would have a Yellow-Yellow conductor. Some even had two Y-Y conductors, because the desk stand actually had two YY terminals. You have to go through the BSPs and decide what you want to reproduce, depending on the contacts that are actually present in your set. In general a green wire would not be connected to a YY terminal, or vice-versa.
As far as I know, OPW is the only source of reproduction cords using authentic weaving machines.
Polarity does not matter for the electrical function of a transmitter. It matters only in the procedures used to be consistent in assembly, so that a new technician always saw the same pattern, and always had to perform the same task, just like an assembly line, even it it wasn't a line. That pin loop was on there because many desk stands onto which the transmitter was installed, still had a good tip-terminated wire for that function, which did not need to be replaced. But those disappeared increasingly during the 1930s, and when wiring did have to be replaced, they used the new cords with spade tips. My 51C was rebuilt in 1933 with new cordage. It actually was converted from a 51AL at that time.
What that means is that you can't just wire every desk stand the very same way. It was not constant in time, as always, materials and procedures evolved. This is why I would recommend to learn the principles of operation of a telephone, rather than rely on colored drawings, and pictures of existing wiring. I think the "Easy Wiring Diagrams" can be rather misleading for novices, because the colors don't always match, they can only represent a snapshot of history, whereas learning the principle is timeless, and pretty much the same no matter the shape of the telephone.
