Possible to specify FQDN for new node address via iControl and Powershell?

I can't speak for PS or snapins (whatever that is) but this worked for me:

cat test_fqdn.json | python -m json.tool; curl -sk -u admin:$PASS -H "Content-Type: application/json" -X POST https://bigip1/mgmt/tm/ltm/pool/ -d@test_fqdn.json | python -m json.tool

JSON file:
{
    "members": [
        {
            "fqdn": {
                "autopopulate": "enabled",
                "tmName": "KSCUCPL01.mydomain.com"
            },
            "name": "KSCUCPL01.mydomain.com:4443",
            "priorityGroup": 100
        }
    ],
    "name": "test-fqdn-pool"
}

Result:
{
    "allowNat": "yes",
    "allowSnat": "yes",
    "fullPath": "test-fqdn-pool",
    "generation": 43,
    "ignorePersistedWeight": "disabled",
    "ipTosToClient": "pass-through",
    "ipTosToServer": "pass-through",
    "kind": "tm:ltm:pool:poolstate",
    "linkQosToClient": "pass-through",
    "linkQosToServer": "pass-through",
    "loadBalancingMode": "round-robin",
    "membersReference": {
        "isSubcollection": true,
        "link": "https://localhost/mgmt/tm/ltm/pool/~Common~test-fqdn-pool/members?ver=11.6.0"
    },
    "minActiveMembers": 0,
    "minUpMembers": 0,
    "minUpMembersAction": "failover",
    "minUpMembersChecking": "disabled",
    "name": "test-fqdn-pool",
    "queueDepthLimit": 0,
    "queueOnConnectionLimit": "disabled",
    "queueTimeLimit": 0,
    "reselectTries": 0,
    "selfLink": "https://localhost/mgmt/tm/ltm/pool/test-fqdn-pool?ver=11.6.0",
    "serviceDownAction": "none",
    "slowRampTime": 10
}