there's an odd spring clip that is usually the "lock" between those 2 pieces ... if I find a pic I'll post it, someone else may have a name for it

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics