updateConnections

This operation is included in the importIntegration operation. You don't need to put updateConnections or activateIntegration in your workflow after the importIntegration operation.

This page is the best source of information about the way that connection information can be updated at deploy time.

There is a blog article about replacements as well - https://flexagon.com/2019/01/flexdeploy-loves-oic-manage-connection-property-replacement/