The Emergency Brake is connected to the...

Jim's Auto Parts and Peps Parts on eBag lists the struts with springs.

I have been unable to find a pic or diagram that shows how the cable attaches to the brakes, and how the struts are placed.

Peps ad:
This is a set of parking brake strut levers for 1965-72 A-body applications with 10" rear drum brakes. This set includes a pair of strut lever springs. Right side lever stamped with "R". Reference Chrysler part number 2534 666-7. One set required per vehicle.