How to take test salesforce com while deployment as salesforce login url for api connection logic app

Question

In logic app i'm using salesforce connector after deployment i observe for api connection while authorize i'm getting login.salesforce.com but i want it as test.salesforce.com which is sandbox url.

Is there any way to define that ?

below parameters are there in logic app currently unable to see anything to define url.

    "parameters": {
      "$connections": {
        "value": {
          "SalesforceConnection": {
            "id": "[concat(subscription().id, '/providers/Microsoft.Web/locations/', 'southcentralus', '/managedApis/', 'salesforce')]",
            "connectionId": "[resourceId('Microsoft.Web/connections', parameters('salesforce_conn_name'))]",
            "connectionName": "[parameters('salesforce_conn_name')]"
          }
        }
      }
    }

    {
  "type": "MICROSOFT.WEB/CONNECTIONS",
  "apiVersion": "2016-06-01",
  "name": "[parameters('salesforce_conn_name')]",
  "location": "southcentralus",
  "properties": {
    "api": {
      "id": "[concat(subscription().id, '/providers/Microsoft.Web/locations/', 'southcentralus', '/managedApis/', 'salesforce')]"
    },
    "displayName": "[parameters('salesforce_conn_name')]"
  }
}