John, is your plan to use OEM handbrake cables? Personally, I wouldn’t even worry about those umbrella handbrake parts. I would get a j hook, a wing nut, and a length of u channel. Drill a hole for the j bolt in the middle, and cut a slot and hole for the cable ends in the channel. Hook the j bolt into the parking brake, attach the cable ends and adjust with the wing nut.
I’d draw a picture but I suck at drawing.
I did my best. Don’t judge. 
Obviously not to scale, but hopefully conveys my idea.
Alternatively, ask Carey or Greg how they do it. I doubt they use any of the umbrella handle hardware.
