Here it is. The electrolytics are C19 & 20, and were contained in a single can atop the chassis. The black wire connected to the xfmr center tap/field coil, a white (or yellow) wire went to chassis ground, and a red wire was the common positive (connected to the 80's heater).
The only reason I knew this was because a previous restorer had already replaced the electrolytics, and this is the way it was hooked up when I got the radio (and the radio worked!) I only re-replaced them because it was kind of a hack-job. I used more modern caps, and mounted them inside the old can, refilling it with Plas-T-Pair.
I saw
a post on antiqueradio.com the other day that seems to confirm that this wiring configuration is correct.
Weird. Bottom line, I guess, is that it works!
Paula