correct positions. Corresponding scales are attached alongside the guide slots
for this purpose.
Measure the distance “Y” between the middle of the coupling nut and the
drill hole in the door leaf below the coupling nut.
Measure the distance “Z” between the middle of the coupling nut and the
lower drill hole in the door leaf.
The measurement “X” between the middle of the coupling nut and the upper
drill hole in the door leaf is not relevant for this screw connection.
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