Basically, I would like to create an item that is a square that has 4 belt connections on two different sides. 4 belts for input and 4 belts for output. Is that possible?

Thank you very much!

I realize this is a super simple question but I just can't find it on my own. Where can I find full prototype definitions?

I am wanting to get started with modding and I thought I would start out with the splitter just to get the hang of it. The problem is I don't know where to find the full ...