How to access data tables from content browser in blueprints

I have several data tables that I want to all load into an array of struct variables.

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This is loading MeleeSkillsDataTable, but I also have SpellSkillsDataTable and a couple others. The problem I’m having is the only way I can find to set which data table this reads from is with the little drop down menu on the node itself.

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I want to basically make this a variable, but there’s no “promote to variable” when dragging off that pin.

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The only thing that I see that might be useful to me there is “Resolve Asset ID” but I have no idea how to use it. It takes a “wildcard” which is… what exactly? It can’t be a string, int, float, reference to a class/object, so what in the world is it and how do I use it? Or should I got about it completely differently?