The original attachment system from Komperdell is not very good. I lost both my baskets.
Make sure to print the small strips and use some superglue to make sure that the basket stay in place after you locked them in. (Look at my picture with the red marking) Maybe there is a better solution, but this is the best I came up with.
The black baskets are a screenshot of the original baskets as a reference.
I printed with a 0.6 nozzle on a Prusa MK3s+ and Amazon Basics TPU
The author marked this model as their own original creation.