On the RV-8A, the RV-10 and the RV-8 I made a simple bracket that mounts to the bottom center of the bulkhead just forward of the panel. The kit provided brake lines are long enough to reach.
The advantage doing this is simpler installation and no parking brake actuator cable. To set the brake I just reach under the panel and through the valve lever 90 degrees.
I should have a photo someplace if interested.