[jgraber]

Thanks for your help, the suggestions so far are
1: generic spade lug of right size
2: find custom fit connector at Kragen Auto or other source
(Any other pointers to custom connector sources would be useful)
3: cut off plastic shroud and solder directly to lug

Options 1,2 allow motor to be "COTS unmodified status"
Option 3 (solder) perceived to be higher reliability, no parts needed, but probably causes motor to be "modified from COTS" status, if that matters.

Re "modification" vs "COTS unmodified status";
How are these usually judged?
Soldering to a solder lug, I'm guessing not count as mod.
Soldering to a spade lug, count as mod or not?
Cutting off a plastic shroud, does that count as modification?
If the shroud is removeable and replaceable, and we remove it, does that count as modification?

Thanks