Hi Mysty and Oz,

After checking that drawing on the wall:
Power the trolley - Flip the big lever on the right.
Use telekinesis to pick up the pencil. Use the pencil to push all the big red buttons on lower left.
Right lights - Use the pencil on the small button pushing them from left to right: 1 3 4 2.
Left lights - Right click to drop the pencil. Use telekinesis on the flip switches and study the number of lights lit by each flip switch.
From left to right, flip switches: 1 2 3 1 4 1.
See that the cable-trolley is now powered.