Hopefully I am misreading it. But I think this is a picture of the TBMs intercom system control panel.
(Image removed from quote.)
Selector switch has ICS (intercom system), VHF (very high frequency) and MHE (???).
That's not the intercom system control panel. That is the late-war AN/ARC-5 Pilot's Receiver Control Unit. The pilot's selector switch for intercom or radio would be on the pilot's remote mount control box. Earlier in the war (1943), the radio set would be a GP-6 Transmitter, a RU-12 Receiver, and an RL-5 Intercommunication Control Unit (which was an "intercom system control panel"). With the early war set up, you had to switch the mike itself in order to talk to the crew. But the newer AN/ARC-5's came out in 1944. These sets are a little weird, in that the pilot could switch to ICS and give commands, but the crewmen had to select ICS on their remote mount control boxes as well, in order to talk back. Regardless, if the pilot was communicating on radio, and the crewmen had their remote boxes set to radio as well, they could still hear and talk to each other. The TBF was known to have an operational quirk where the entire crew would stay on radio and banter back and forth and clog up mission comms, and forget to all switch to ICS (which was meant to be the "banter channel"). Regardless, with the newer radio set, they could still all hear each other with their control boxes set to radio. In fact, if a crewman was on ICS while the pilot was on radio talking to them, the crewman could hear him, but if the crewman tried to transmit back on ICS, any radio traffic from the pilot's position would walk over the crewman's ICS transmission. And if the pilot was on ICS and the crewman on radio, the communication would be one way only, pilot to crewman. This gave the pilot's transmissions - irrespective if they came from ICS or radio - priority over the crew position transmissions.