70 Cuda What are the brackets on the rear frame rails for?

[themechanic]

There's a stout bracket on the rear frame rails on either side of the fuel tank. What are they for?

I'm assuming for shipping tie down?

 

[floyd]

These are the tie down brackets used during shipment.

 

[themechanic]

These are the tie down brackets used during shipment.

View attachment 87157

Thanks