Installation is simple. The adapter is inserted from below into the checkpoint footpacks Thule until it clicks.
Then the screws are loosened, which opens the holder. Once the adapter is fitted to the roof rails, the two screws are tightened again. Done.
For the use of a carrier on a Thule roof rail-station of Seat Leon ST, Golf Variant in a newer generation or the Audi Avant simply essential, as these cars have all flush extending roof rails.