[Adrenaline] Vehicle Customization

I’m wondering if @ebrunsell might be able to weigh in on this, but in the Vehicle section of the character sheets there is a Customization area with four hexes beneath it. While the words “customize” and “customization” appear in the Garage entry, there doesn’t seem to be a discussion of what Customization means or is used for (even just a “Work it out with the GM!” statement). Like Vehicle Modifications or Traits, can/do Customizations give quality or potency to actions?