Need help identifying objects.

[tncatadjuster]

This was posted on another board and got me searching, no clue at this time.
Carriage bolts, something on a wagon?

 

[454ragtop]

Brackets to hold the bows for a covered wagon?

 

[tncatadjuster]

Certainly is a possibility, the weep hole for moisture would make sense.

 

[PugetDude]

World's oldest vehicle cup holders.
For a flagon of ale when traversing the prairies...