The TARS control panel only allows to change the Guard frequency per sim, however the push to talk keys are a global setting in TARS for VHF AM, FM and UHF.
In the KA-50 we have VHF 1 and VHF 2 as radios. No UHF as far as I can figure out, but please correct me if I am wrong.

VHF 2 can be switched between AM and FM mode. VHF 1 cannot (again, correct me if I am wrong).
Does this mean we use FWD to talk on VHF 1 and BWD to talk on VHF 2 in FM mode?
Does this work out of the box?