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How very handy!
Hard to say without seeing a before picture. Could it be because the crates or now closed .vs. open wire that they can see all around? The things that catch my eyes are the sheet hanging the kennel on the left, and the spare pieces of wood overhanging the top of the kennels. Was it always there? Were they used to having to jump up into their crates, or was this just a fenced enclosure prior? Where did you have their crates before your nifty setup?
I would just play with them near crates and feed them nearby. Before meals do some desensitization and counterconditioning using high value treats . Reward for behaviors that will gradually build toward getting them into the crates.
For example start with walking by crates, then have them approach head on, take food from riser , put paws on riser etc. It may take some time and you should have comfort and success at each step before moving on to the next one.
