It's come to my attention that others looking for an answer to this question haven't found an answer but have found this post. I did work it out so here are the instructions.
load a clean install, NO mods, then install https://cslmodding.info/modtools/ then restart skylines after enabling
create a new asset in the editor, choose building, then choose a specialised industry building as your template, it must be a specialised industry building or you won't get any resource settings
you can then choose which model you want, I ripped the generic industry buildings using modtools
then when loaded in the editor press ctrl+e to open the scene explorer, then navigate to, ToolManager/ToolManager/ToolController/PrefabInfo/BuildingAI
there you will find the options for different input and output resources