From what I can gather from this picture, you put the bag of salt in the brute can and let the RO/DI fill it up slowly.
Just to be sure, next time fill up the brute with water first, then measure the correct amount of salt and add it to the water. When mixing that much at a time I usually mix 1 cup less than what the directions say and adjust from there.
yup that is what I did.
not sure why I am not new to this was thinking it did not matter for 1st fill. who knows what I was thinking its been a very long slow build so much of be spaced out.