If you included cure #1 then I would say that you go have a couple of days but the meat will start turning into a cured product. The problem you have in curing inside a regular fridge (as compared to a dedicated curing chamber) is that you will dehydrate your product too fast. As @twilliams mentioned, the sooner the better. I almost forgot, that you don’t have a culture so you may not be able to maintain a product which will acidify enough to kill bad bacteria (conjointly with the cure #1) but if you did the longer you keep it in the fridge the more acidic it will become so your tang would be yuk after you cook it (releasing the ECA)