Sybil you could say you support his decision, and that you will leave it to him to decide how he will go about it. You might share some of the ways his drinking has been detrimental to him and the family.
Beyond that, try to stay out of his recovery, and let him decide how to go about it. I would suggest taking the wine out of the house for a while. It can make things harder for the drinker who will probably be experiencing cravings.
Many A's have times of the day or situations which trigger the urge to drink, often after work, or as you've suggested, when the kids go to bed. There will be that habit to grab a beer at a certain time. It might help him to have soft drinks in the house, or set up some other ritual to replace the drinking. Discuss with him, and you may be able to help in that way.