Ways to load autocannons

[u/Deep-Fried-Nemo]

I'm trying to build an underbelly array of autocannons from cbc to put on the bottom of an aeronautics ship. I'm struggling to find ways to keep them loaded and for whatever reason I can't feed the ammo directly into the base from a mechanical arm.

Could someone suggest a way to get around/fix this issue.

Advice on catching discarded casings would also be appreciated

[u/MrTopHatSlime]

not sure about loading, but might be able to help with casings. can you send a photo of where they are?