Oyen Digital DATATALE RS-M4T 4-BAY THUNDERBOLT - Manual (Page 16)

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11. Place the RAID System with its Front View facing you and the top lid on.
Position both hands on the top lid, one in the front and one in the back.
Simultaneously, push the lid firmly downward and toward you, back to front.
A “click” sound would indicate grasp of the top lid security clasp.