Where was the Shekinah glory located in the tabernacle?
The Shekinah glory was located upon the mercy seat, which is upon the ark, behind the veil in the holy place within the tabernacle. That was the very presence of God, and the high priest could enter there only once a year on the Day of Atonement.
Les explains that the Shekinah glory rested upon the mercy seat, which sat upon the ark behind the veil. He notes that this was the very presence of God, and the high priest could only enter that place behind the veil once a year on the Day of Atonement. The context describes the Lord appearing in the cloud upon the mercy seat, and that access was restricted so that Aaron would not die. Les also connects this to the Day of Atonement preparations and the high priest's cleansing ritual.
And the LORD said unto Moses, Speak unto Aaron thy brother, that he come not at all times into the holy place within the vail before the mercy seat, which is upon the ark; that he die not: for I will appear in the cloud upon the mercy seat.