This should only take about 2 minutes.
Open up up your kit right-side-up and remove the spray bottle, instructions, and humidity barrier. Leave the substrate block and blue “faceplate” in place.
Push the blue wood-grain "faceplate" down against the substrate block beneath it to create a snug/flush fit. The Idea Is to blackout the surface area of the block except for the middle where the mushrooms will grow from.