How to make baby parrotlet not aggressive with conure?

I am thinking of adopting a baby parrotlet, or maybe the parents. But the baby has a chance of getting along with my conure. I would never put the adults with my conure though. So what would I do to introduce them safely? I don't care if they're best friends, but I want the cages next to each other so the parrotlet can't be so aggressive he'll fly to the conure cage to attack her. The baby's wings will be clipped once he learns to fly. He's not weaned yet.