Setting up proxy snmp on juniper

Doesn anyone have any experience on setting up juniper as proxy snmp, and how to connect to libre with this proxy?

as far as i can see junos can handle the proxy, but how do i set up libre against this proxy?

no experience with Juniper but maybe this help?

-> https://docs.librenms.org/#Extensions/SNMP-Proxy/

the doc only describes snmpd but nothing in further (like for example how you query a device in the proxy, or how it works).

i will build a test enviroment here on my desk and see how it works - maybe i can build a community per device on the inside, and the i just need to enable identical ip