How open destroyer gun mounts received ammunition

How were shells supplied to the open, shielded mounts on interwar destroyers?

Shells came from nearby stores and handling spaces through pipes or deck scuttles, with several access points serving different gun angles.

Open gun shields did not require every shell to emerge through the floor of the mounting. Handling rooms and small shell stores could supply the guns from behind. Pipes or deck scuttles allowed shells to pass up to the gun crews. Several scuttles around a mounting's perimeter could serve different training angles, with ready-use ammunition kept nearby.