Exactly as described, the full user-manual (145 pages). Perfect.
Text excerpt from page 5 (click to view)
INSTALLATION
Drilling the Support surface and Fitting the Hood
Make a rectangular opening on the base of the hanging unit, leaving a minimum of 13 mm from the outer edges.
Hood Type L1
52 497
70 677
259 13 L1
SNAP-ON FITTING For hoods with snap-on side supports only, set up for a support panel thickness of between 15 mm and 30 mm. � Insert the hood until the side supports snap into place. � Lock in position by tightening the screws Vf from underneath the hood.
SCREW FITTING For hoods without snap-on side supports only. � Fix the hood to the hanging unit using the screws 12f (3.5x16 self-threading) provided.