Starter relay location 72 charger BB, Pics, batt cable n

Where is the starter relay location on a 72 charger? I thought it might be in the same location as my 73, but it's not. Can anyone provide a pic or two?. Some butcher mounted a Gm type starter solenoid, and I'm trying to get it back to original. And where would I find a new battery cable?

BIG BLOCK if that matters.

Pic of my old 72 Charger. You can see it just to the left of the battery on the inner fender.