This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/aKfiHNMSNqi

There is one single file for use on larger printing beds or broken up files for smaller printing beds. The connector is there if you need to use the cut parts. Just glue it onto the middle section and you will be able to puzzle it together if needed.
The single file has 1 card divider you can cut out and then print as many as desired.