Right across you are 5 thistle like structures. Your aim is to get all of them activated with current flowing through all of them.
You activate the control panel infront of you by clicking on it. You will see a close up of the stand now.
Move the horizontal and vertical levers. The horizontal levels move the tower left-right and the vertical levers move the tower up-down.
If you find the correct position of the tower using those levers - it will shine a light on a thistle and produce sparks. You have to do this to all 5 thistles.
If you want specifics - post again.