How do I create a Slack thread from a Jira ticket?

[Paul Benati]

I am looking for a way to create a Slack thread from a Jira ticket.  In essence, I'm hoping to instantiate an Atlassian Assist connection from JSM to Slack, instead of from Slack to JSM.  Once in place, I want it to act the same as Assist (i.e., a bidirectional communications channel between the Slack thread and the JSM ticket).

I know the appropriate Slack channel to create the thread in via a custom field containing the channel's name (not the channel's ID).

How can I make this happen?  Thanks.