How to make archon mode?

so i’m wondering how i simulate the archon mode game type. because i don’t see somewhere to set two players to control one base. ofc i am SO new to this editor… but yeah, would be great if somebody could explain this to me.

I think it’s an alliance status, “ally sharing control of units” or something, to do both ways. I’ve seen that on rescuable units before, but I think that’s what you would need here.