Does my 83 1.5L have break pressure regulator?

I am doing my rear drum brakes as there is some fluid leaking from the wheel.

I am changing the cylinders at the back, but vw herritage has three different types and I am not sure which one I need.
Does anyone have a photo as to where the regulator sits or can explain it to me?

if you look in front of the passenger side rear wheel you'll see it if fitted, follow the brake lines from front of car and the valve would sit up in the recess just after the rear passenger footwell. its a big thing with 4 lines and a spring loaded lever you cant miss it