Letting setting up Solarwinds Integration with WHD I'm seeing that it leaves much to be desired. It could be that I'm not using the correctly but so far NPM is creating tickets that just state "Alert me when a node goes down" but doesn't identify the node that is causing the alert to be triggered. I see better WHD and NPM integration as something the WHD team is working on so I'll be looking forward to seeing what they'll come up with.
You need to include variables in the Alert Sharing tab of Alert Manager. Every one that you include will be passed to WHD in the SolarWinds Orion field.
One to note is that if you want to populate Request Detail in the Web Help Desk ticket you need to add a Property Name of Status Description. You can then add text and multiple variables so it makes the ticket look a lot better.
For example here is one I created for Exchange monitoring: