Gotcha.
Speaking about logic, I'll make a dupe message about your Cable Boxes not having a 'Junctionbox' tag by default.
Had me head scratching for a bit on why my updated Dugong wasn't powering up.
Junction boxes are using 'junctionbox,light' tags, while Cable box is using 'logic,light'
And for some reason the 'logic' tag can't be removed.

@One fucking hammer
yes.. its for a big pump idk
its too hard to detect empty enventory using xml logics in other ways

Huh, I've tried to place several Large Steel Cabinets, when adjusting Dugong to have no starting placed items, but there's only 1 slot.