Assigning unit graphics?

[neonlicht]

In the Modern Campaigns series, how do you assign units with graphics that will show up in-game?

For example, when I design a scenario in the editor I get units that are missing their unit unit graphics---how do I fix that? How do I get the unit graphics back?

Another example: when I create a unit in the OOB editor, how do I assign a unit graphic? Do I use the "Component" drop-down menu? If so, why does this drop-down menu not include all the unit graphics in the relevant unit-graphic folder (directory)? Or maybe I've got this wrong?

In the Danube 85 game, the Austrian unit-graphics directory contains a graphic for Centurian-tank Turrets. But this graphic seems not to be available via the OOB editor ("Component" menu).

Maybe I'm misunderstanding something---and so would be grateful for any info. Many thanks in advance! :-)