Time to make cake.
1st put 1cm sterilized vermiculite with coco.
2nd put your mycelium in the box.
3rd put 1cm sterilized vermiculite with coco over mycelium.
4th put box into dark place.
Good luck with your grow. Several years ago I grew a few batches of a Cambodian and Amazon strain using a simple homemade brown rice flour and vermiculite blend which worked out well. Then a humidity chamber with wet perlite on the bottom. Sat my cakes on plastic yogurt covers. Worked out well. Still have friends asking me if I'm going to grow more. Enjoy the trip.