putty directly to OpenManage Integration for vCenter

I need to putty directly to the centos OS that runs Dell OpenManage Integraion for vCenter, to perform cipher hardening and other tasks necessary to pass security scanning.

My putty connection is refused (though I can login to the appliance using the VMware console, and the web portal for advanced settings.)

Looks like remote access from putty is turned off in the appliance.  How can I turn this on?