Countries Map Kibana

Hello, I am trying to use the Region Map for Kibana, but Im having a hard time.

It seems that my data terms has the countries listed in lower case letters, while the join field is in Upper Case letters.

Please Help!!!

You can use a scripted field to convert your terms to uppercase and then use that as the join field.

Got it , how would I create the script??

The second part of the answer here is the exact scripted field you need: How to convert one field in uppercase in kibana