Oh boy... you better get those nest boxes made right away!! You do want your pullets to start, from day one, to lay in their appropriate nest boxes. It can be hard, sometimes, to reteach them to lay in a nest box. Yes, they will lay their eggs on the ground or wherever their little hearts desire. Sometimes, they even do that when they have wonderful nest boxes. People encourage their pullets to use the nest boxes by putting a golf ball or fake egg in the nest box. Once the girls start laying in the nest boxes, you can remove the golf ball or fake egg.
You should be getting an egg any day now from those sex-links.