It is all about ARC/ARK

[David Merrill]

A CLOUD by day. A PILLAR OF FIRE by night.

Pointed upwards, the Tabernacle roofing was rolled back so that the arcing and manna were projected up and rained down on the Israelites. See how if the roof material is removed the walls will project the arc lighting upward into the cloud, that is seen by day? In the morning there will be a thin coating of manna (monatomic gold and other transition metals), just like it says.