I can't post any pics as I'm on holiday and the instructions are at home....
Suffice to say the cross-bars are meant to be installed on the car at the points located by the 2 impressed dots on the roof rails bolted to the car roof and the funny tool-thing is just an allen-key with a built-in pointer that enables you to tighten up the cross bars to the correct degree of torque , no more and no less.........
The end caps of the cross-bars need to be off to torque them up correctly, so hopefully you'll have the set of keys that come with each set of bars?.........