Install Opendistro alerting for Windows ES and Kibana

I am new to opendistro alerting feature. I have ES and Kibana installed on Windows. Based on data from ES i need to send a notification to opsgenie portal via alerting feature offered by Opendistro.

Can anyone please help me with doc or steps to install opendistro alerting plugin for windows ES and Kibana

I followed this link - https://opendistro.github.io/for-elasticsearch-docs/docs/install/plugins/#install-plugins and downloaded the Zip file and tried hitting the command elasticsearch-plugin install opendistro_alerting-1.2.0.0.zip on powershell. I got Error: unknown plugin opendistro_alerting-1.2.0.0.zip

Requesting your help to complete this task