Blackboard keys and Enums

So, Player controlled NPC’s are the core of my game, but I’m having trouble trying to string all the references together. currently the player controlled npc has a central Behaviour Tree with three sub trees. it’s for three postures basically, agro, bal, def. but I cannot get the key value in my blackboard keys to spit out those three options so my decorators can activate the correct run behaviour node. how do I get my blackboard keys to reference specific Enums?

I’m new, so if that was poorly explained please tell me.