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For anybody who might be looking this up, I figured out that side A is what goes into the hole. Upon looking at the shape of the grommet on both sides, and seeing the marks on the body of the car, it made sense. Here's a photo with side A into the hole and side B showing:
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.