Hello, NCM before version 7.3 is still based on SWISv2, so in your case you need to use -v2 switch in your connection for calling the NCM verb (in your case e.g. $targetv2 = Connect-Swis -certificate -v2). After upgrade to NCM 7.3+ it should work with just one v3 connection. I hope it helped.
Thank you Jan, that does eliminate the error.
What should I expect for the add to look like in the GUI in NCM after adding it? Are there additional properties that need to be added?