The final step in any brake job is bleeding the brakes, done with the accumulator un-installed.
If the calipers were installed correctly, the bleeder screws will be located at the top. Pedro at ABS attached a rubber hose to the valve and ran it into a plastic collector.
The valves can be loosened but should not be opened until someone inside the car applies and holds pressure to the pedal. When the valve is opened, the pedal should lose resistance. The fluid should be moving at a fast rate, otherwise, it could indicate a clog in the line. Close the valve before the pedal is released to prevent air from being sucked back into the line.
Start with the front left brake, continuing with the front right, rear left, and rear right, to bleed the lines from shortest to longest. Finally, turn the ignition key to the ON position to start the electric pump. Let it run until fluid flows through the accumulator mounting hole. Install the accumulator. The system is now pressurized and ready to go.