If you press the levers in a certain order, it allows traitors to press E on a certain traitor trap for 6 credits. Once you press E on the little hand thing in the air, you can then press E on a keyboard down in the facility that kills everyone in the outside part of the map.
After some consideration, you will have to make a rule suggestion if you wish to make that action traitorous. As it stands, pulling the levers is not traitorous as it is not written within the rules. Thus, you cannot kill anybody for pulling levers including the detectives.
