After all the time I spent trying to decide which model to buy, someone about 5,000 miles away, sent me the wrong unit..
One of the new LCD models came today..
This seems to be the jumper for 115vac or 220vac.
The green LED started cycling when I connected two 10w PVs.
Using special PVC chair-mounts, they were running at 0.49A@25.5 volts, (12.495 watts)!
I took it apart before testing, because I saw this video.