Radio lead in Cable

Looking for a Radio lead in Cable to put under my dash, to put on the nub in the attached pic. I see there are repros of this—seemingly—but these have that bracket attached to it, and I can't find any place online that'll confirm that it comes off.

The other end would be male to go into the new radio.

 

Should have one, just need to find it.
Fred

 

Do you need the 8” cable with the oval plate that bolts to the firewall?

 

Here's one I have.
Fred

 

It's not intended to come off,..yours is broke

 

What Hugger said

 

Well that explains that. I assumed this was a radio-free car. Fred, I'll send you a PM.