What is the procedure for installing the Engineer's Toolset onto my Orion server so I can access it from the Orion Webpage?
I assume you have toolset installed on the box you want to run the integration from? In the browser you could get a popup to install the SW API.
From the SolarWinds Orion NPM Admin Guide:
Integrating SolarWinds Engineer's Toolset
- Configuring a Toolset Integration
- Adding Programs to a Toolset Integration Menu
I hope that helps.