NPD images and links...for reference...
'67 Battery top auxiliary bracket;
https://www.npdlink.com/product/bracket-battery-clamp/101049?backurl=search%2Fproducts%3Fpage%3D1%26search_terms%3Dbattery%26top_parent%3D200001%26year%3D1967&year=1967
'69 bracket... (also listed for '70)
https://www.npdlink.com/product/bracket-battery-clamp-to-apron/101050?backurl=search%2Fproducts%3Fsearch_terms%3Dbattery%252Bhold%252Bdown%252Bbracket%26top_parent%3D200001%26year%3D1969&year=1969
'67 Battery top auxiliary bracket;
https://www.npdlink.com/product/bracket-battery-clamp/101049?backurl=search%2Fproducts%3Fpage%3D1%26search_terms%3Dbattery%26top_parent%3D200001%26year%3D1967&year=1967
'69 bracket... (also listed for '70)
https://www.npdlink.com/product/bracket-battery-clamp-to-apron/101050?backurl=search%2Fproducts%3Fsearch_terms%3Dbattery%252Bhold%252Bdown%252Bbracket%26top_parent%3D200001%26year%3D1969&year=1969