Can I connect to another Jira server?

Hello! I have a question.

We're using a Zephyr Scale in Jira. But we're using two jira server. 

For example, we set the Zephyr Scale in A Jira server. But we create bugs in A, B Jira server. 

I would like to connect Test Case in A Jira server to Bugs in B Jira server. (Test Case - Traceability - Issues)

How can we connect that?

For reference, A Jira server and B Jira server are synchronizing. So I can link bugs in A Jira server to bugs B Jira Server.