So its basically a matter of replacing the stock bracket with the new one right?
Not quite.....Wheels got it right.
You won't be replacing a stock bracket with the new one. You remove the factory dust shields and in its place bolting the Brembo bracket to the rear hub, using three of the four dust shield bolts. The e-brake is then bolted to this bracket. Then connect the original e-brake cable.
This process is the perhaps the easiest of the entire Brembo kit installation. There are two other (in my opinion) very important issues often overlooked. The Brembo rotor hat is a few mm thicker than factory. You should get longer Honda wheel studs. I forget the part number, but I think they are for a Civic or Accord. The original ones tap out with a small sledge; however, because the replacements are a tad longer they will not go in at an angle. With a Dremel tool you will need to shave a few mm off of the backside of the wheel hub. This is much easier than R-n-R the rear wheel hub assembly. Once you get enough aluminum shaved off, the longer studs go right in, one at a time as you rotate the wheel flange. Line up the splines of the studs with the flange, stack about a dozen flat washers over the stud and "pull" the new stud into the flange by cranking on a lug nut.
The other thing that is very easy to mess up on, is the Brembo caliper bracket bolting to the hub. Note the shiney studs pressed into the bracket. Look straight down the axis of the stud and you will see that it is not geometrically centered into the bracket. It is off by a mm or two. Put this on the wrong way and after enough brake pad has worn off, you'll be gouging into the rotor because the rotor is offset within the caliper by a mm or two. It must be centered under the caliper. Unfortunately, I cannot remember if the stud's offset is toward the inboard of the car or the outboard of the car.
I realize that your question is about the e-brake but I offer up the above assuming that you will or have upgraded the rotors and caliper. We are talking about the 12.9" rotor kit, right?