Thanks @Robert.Wall I’ve added pinout pictures to the emonPi2 hardware page: https://docs.openenergymonitor.org/emonpi2/hardware.html
If your happy to make up an adapter cable that’s great. I posted about adapting an RJ11 emonVs to provide a single phase RJ45 emonPi2 output here emonPi2 Pictures & Spec - #26 by rupert but that’s the other way around to what you need.
Happy if you want to post your emonVs back to us and we can make the modification here to provide both and RJ11 and RJ45 output.