My Accusump is 1 quart. When the oil pressure is high more oil goes into the Accusump and as the oil pressure drops, oil flows from it back into the engine.
I typically rev the engine as I shut it off to push oil into the Accusump so it will discharge into the engine next time I start the car.
I put the sump plate back on this afternoon and put in 5 quarts - 4 for both sumps and 1 for the oil cooler. The level in the sump will drop as oil goes into the Accusump.
I added a switch to the Accusump valve so I can turn it off to retain the oil in the Accusump when I am working on the car and want to turn on the ignition.