For the testing period you want to configure SOI 4.2 enviornment with a Spectrum Connector connected to the production Spectrum Server still active and in parallel have a Spectrum Connector from the SOI 4.3 environment connected to the same Spectrum Server.
Can 2 connectors be running on the same Spectrum Server and sending data to 2 separate SOI enviroments?
SOI 4.3
Guidance
Yes, you can install 2 Spectrum connectors on the same Spectrum server, one synching data to SOI 4.2 and one to 4.3.