Punny AND insightful, thanks CB.

I will consider other manufacturers and see if I can find any premade adapter cords.
Also I was able to track down a Widder t-stat with BMW-end that I could use if I installed another powerlet outlet -
http://www.derbycycles.com/cgi-bin/eShop/index.cgi?cart_id=520230.17941&pid=406&product=Widder_Products&count=1 
Update edit: my other controllers tested out ok with a tester, so I must've been having a blonde moment thinking they weren't turning the vest off. That or I was accidentally turning the knob back on while riding.