This should only be used if each proxy has different backend servers, otherwise votes will duplicate
Setup each proxy as its own proxy network for VotingPlugin before setting multi-proxy up, each proxy can use a different proxy method
Note if using REDIS (Not for multi-proxy method) you will need to set a different redis prefix for each proxy network (This is so that all proxies can use REDIS at the same time without issue)
Check connection status with
/votingpluginproxy multiproxystatus; each proxy should log the status message.