What is it?

Hello all,
I know this is a stab in the dark! I'm working on a 74 Duster that was a /6 car. I There was a funny looking bracket/strap mounted on the inner fender below the master cylinder. I lost the thing during my current project and trying to determine what it was for and if I should worry about replacing it. It looked like it could have been for the battery cable going to the starter, just don't know.
v/r
Ron