Articles Fields Connection plugin for Joomla backend
With this plugin you will be able to create connection for Joomla Content Fields in Admin area.
It uses the same logic for connection as Articles Good Search module and this demo - https://joomcar.net/joomla-articles-good-search-demo-with-connected-fields
But, it works for backend article's edit form.
For make a connection, all 'child' field values should contain a part with complete value from 'parent' field.
Read more about a connection here - https://joomcar.net/products/joomla/joomla-articles-good-search-module#docs