Buick rear seat help

I am trial fitting the rear seat in my 50 Buick Sedanette, I understand the concept of how the back rest attaches but cannot tell which part should locate on the 3 tabs.

The seat is just bare springs and in pretty average condition so maybe the bar is missing.

Does anyone have a pic or good description of what the bar looks light......on any 50's GM car.

thanks

Bevan

 

gday bevan,
top or bottom? i can have look at my 49 should be the same.
cheers darren

 

top half.

thanks

 

anyone??