ask the people who designed the box...or use winisd or online software and see what the measurements tell ya. i experimented alot back in the day with car subs and for a car design like the corvette having sub shoot up of window was best. for trunk...shooting of tailgate. you want the wavelength to be long as possible.
Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300 LG oled c9 77
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5, Magnepan LRS, Audioengine A2+
Subs: Rythmik FV25HP, Rythmik FV15HP, Velodyne HGS 12, Velodyne VA1512