Delphi Firemonkey ComboBox insert in AdoTable


So, I’ve been using LiveBindings between two tables at a combobox to get the Id and Description of a foreign key(with the Item.LookupData and Item.text properties) and assign the key to a field in another table with the SelectedValue propertie. This is working fine i guess but i’m using custom dbnavigator controls to make a “register form”.
I’m using methods like this to make the inserts: adotablealuno.FieldValues[‘Nome’]:=editnomeAluno.Text;

But I’cant find how to use the combobox in this way, i’ve already tried the ItemIndex and Selected properties, but none of this work (I’m using a Access DB btw). How can I use my foreign key in ComboBox for this?

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