The Lever Panel was a secret object with 5 levers, each with a blinker on the bottom. If this blinker part was white, that means that it's on. If it's black, that means that's off.
By entering the combination "Off, On, Off, On, On" an audio (listed below) would play.
In an unknown update, the panel as well as the Morse Code Blinker next to the Hotdog Stand were hidden underground and could only be found via glitches.
The sound that played when the right combination was entered: