You really should leave them open wide at a minimum.
On top of a cupboard or bookshelf - somewhere out of the way but preferably where they don't get dusty. They have to have air. After 6-8 weeks you can put them into a box and close the lid. You'll know if it doesn't work because they will sweat or get dos or warp. What about a tiny wire shelving system or a bookshelf?
^^This!
If you use a wire shelf, though, line it with freezer or parchment paper before putting the bars down. Airflow is key to curing soap.
I have started keeping a small copy of the recipe, in exact weights, on the end of the basket for each batch.