The bindings come with installation instructions, but if you got used bindings that didn't come with instructions...
Quick question: are you putting these on new skis, or on skis that already have bindings on them? If they're old skis, remove the bindings already installed and use the old screw holes for the new bindings. If they're new skis, take them to a ski tech. You've got to drill holes in your skis and there are lots of calculations involved - how much you weigh, the skis being used and the way you ski determine where your boots should be on the ski.
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