You can remotely deploy RG agents on Windows neighbor from the server agent. For this, you can click on the Deploy agent button of a neighbor, or select several neighbors and click on the Deploy agent button on top of the page.
You'll be invited to specify a Windows administrator credential for the targeted machines. If you target several neighbors, they have to share the same credentials. You can also specify in which node those agents will be deployed.
Once validated, an order is sent to the server agent, and those deployment will be done in succession. You can follow their roll-out in the Deploy activities tab.
A Windows RG agent will then be downloaded form RG cloud, and installed remotely by WMI. RG agent weight stay stable in time, with a size near 15 MiB.