DJ Delorie wrote:

You mean something like these?
http://www.delorie.com/house/furnace/furnace-blinky.jpg

Just push the wire in and it's held, press the white button to release
it.
Did a screen capture of the enlarged foto..(a) not wire push-in like
what the "fb" system uses, and definitely NO release tab/button; It is a
lever one lifts to then push in wire, then lower the lever to (am
guessing) latch.