The image below is from Spaceflight Now's Fresh batteries, experiments on the way to the International Space Station
In the photo there appears to be a giant reentrant "hole" in the side of the HTV spacecraft with some heavy equipment that is equipped with the standard grapple thing for the ISS' robotic arm.
During launch I can't see how this opening could be exposed to the atmosphere. I would expect it to be covered since all that insulation would probably rip off in supersonic atmospheric flight, but in the image it looks flush with the lower part of the spacecraft painted white, so I'd like to understand how this is covered for launch.
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Japan’s eighth HTV supply ship is seen during launch preparations at the Tanegashima Space Center. Credit: JAXA