Switch on Driver Seat

[pasweet]

We have a 2010 Sunseeker 3120,Found a switch on the driver seat, left side near bottom, it has a battery sym on it, but I don't know what it is for,anyone know thanks

[Txcamper]

Ejection button 

[bclemens]

Emergency start switch. If you drain the chassis battery, you can start the engine off of the house batteries.

Hold down the switch when starting the engine, release when done.

[pasweet]

Thank You, Hope I never need it, but at lease I know it there