there are four clues in total you can find by interacting with the sticky notes everywhere
1, Staff reminder Do not try to increase Generator # power it is already at max capacity.
2, There's a symbol on the generator, but you can't see it
completely thanks to the rust, but you can make out a
triangle-like shape.
3, To reach optimal energy output Generator 1 should always be more than Generator 2 but less than Generator 3.
4, For optimal balance, the total power output of the three generators should equal 19 units.
Answer649