J3 seat brace straps

[PlansbuiltPA11]

Hi all-

I have a new unused J3 front seat frame I am getting ready to install in my project. It has a couple of sheet metal straps affixed to the bottom of the front edge of the seat frame. I have noticed in the past that these are utilized as diagonal cross braces that attach down below seat frame somewhere. Can anybody tell me to what these strap braces attach to, and with what hardware? I have not been able to discern anything from various posted photos I have studied.

Thanks,
Larry Jackson

 

[longwinglover]

 

[huston marlowe]

 

[longwinglover]

 

[PlansbuiltPA11]

 

[longwinglover]

 

[iowa]

 

[longwinglover]

 

[iowa]

 

[longwinglover]