Where does the long seat spring go?

[Mr Bee]

1939 Dodge, Plymouth, Chrysler etc (cars).  Does the long seat track slider return spring connect on the driver's or passengers seat track?

 

Also, does it mount on the front or back of the track which is fixed to the floorboard?

 

And finally, does it mount to the seat frame somewhere, or connect to the top slider of the seat track?

[sidevalvepete]

Not sure whether this is the same as your '39 but it helped me with my '38...

[Mr Bee]

Wow, thanks for your great response!  Perfect, exactly what I needed.  Thanks so much...never even thought of mounting it to that center bracket!