Tripp-Lite DDR1327NBMSC El Manual Del Propietario página 9

5. Install Notebook Computer
5-1 Attach Notebook Mounting Assembly
Tighten knob firmly, but do not over-tighten.
5-2 Attach Notebook Holder
Sleeve
Arm
Knob
9
Slide the back of the notebook holder
down onto the notebook mounting
assembly until you hear a click.