No, wait until your nitrites are completely 0. It's not done curing. Right now, your rock has bacteria that eats up the ammonia. It now has to grow the bacteria that eats up nitrites. Once that's done you should get some nitrate readings, then it's ready to dump in the main tank.
The cycle process is basically to build up your bacteria that eats off all ammonia and nitrites. Without those bacteria, nothing till eat the ammonia for a while (those bacteria are everywhere...even in the air, and they end up wherever they find ammonia). Once you have enough of those, then you won't have ammonia problems because the bacteria will eat it up before it starts killing off your fish.