PBXAct 25 - How to use eth0 for all VOIP traffic and eth1 for downloading updates/non-VOIP traffic?

My PBXact has 4 ethernet interface ports, at the moment only the eth0 is connected and everything goes through this port.

I have eth0 connected to a VLAN for voice traffic which is configured to use a specific internet connection for VOIP which is more reliable.
The PBXact also has updates/module updates etc. that get updated weekly and I would like to have that type of http traffic / anything NON-voice/SIP/registration related go out the ethernet port eth1 which is connected to the network’s main LAN which has a higher speed unlimited internet connection.

How to configure such a setup?