That appears to be the 68-69 bracket Dan, although I have seen them on some 70's as well.
I dont know why there are 2 different ones for 68-9 and then 70, as there is only one inch difference in the mounting hole but slotted openings for mount to the cooler body, perhaps a later design change or different vendor.
Here are the different brackets, the wide one being the common drivers side.
Top is Charger ( also installed on the repro cooler if ordered for a Daytona ), next is 70, then 68-69 and last on bottom is 66-67.