The Overhead High panels (O13, O14, O15, O16, O17) are part of the Overhead Panels array.
The O13 panel contains circuit breakers for many Shuttle systems. This panel is not simulated in SSM2007.
The O14 panel contains circuit breakers and switches for many Shuttle systems, including the Brakes (Main A), Flight Controller #1, and the left OMS engine.
The O15 panel contains circuit breakers and switches for many Shuttle systems, including the Brakes (Main B), FLight Controller #2.
The O16 panel contains circuit breakers and switches for many Shuttle systems, including the Brakes (Main C), Flight Controller #3, and the right OMS engine.