What is the purpose of the vertical splitter and the NACA duct at the MQ-9 Reaper engine scoop? The engine scoop/intake on the MQ-9 features a vertical splitter at the inlet face, as well as another smaller NACA duct on the top cowl surface just aft of the inlet lip.

I am guessing the former functions as a vane or diverter to channel airflow to different parts of the engine presumably for cooling, but the additional NACA duct at that location seems unusual (another inlet for an inlet?).

Is that NACA duct meant to modify the airflow within the engine scoop? Or is it specifically routed to another part of the engine altogether?
The NACA duct is probably routed to a gearbox oil cooler. The turboprop engine has its air inlet at the prop end of the engine, which means a splitter is needed to divide the incoming air flow into two ducts, one on each side of the engine, in order to conduct the air back to the inlet.