In tracing a SW stacking cable and connector, ~their~ 25 pin connector appears to tie
pins 14, 18, 17, 21 together, and would connect to (I think) pins 10, 7, 6, 3 of
a regular 25 pin printer connector.
Also, pins 15, 16, 19, 20 connect together and would go to pins 9, 8, 5, 4 of
a regular 25 pin printer connector.
Pins 22 of the SW connector would tie to pin 2 of a regular 25 pin printer
port connector and pin 23 of the SW connector would tie to pin 1 of a regular
printer connector cable.
And, I ~think~ if you find that the phase is in phase between the two SWs when you
mean to have them out of phase (240VAC), then you can try swapping pins 1 and 2 of
the printer connector or pins 22 and 23 of the SW connector end.
No guarantees, but maybe worth a try if you have some patience and some connectors.
boB