Motorglider microphone wiring question

Hi,

I am trying to help a customer out with a motorglider microphone wiring
question. I'm hoping someone here will have a suggestion.

Motorgliders often have both boom microphones and aviation headsets.
Obviously, the headsets are used when the motor is running and the boom
microphones are used when in gliding mode. It wouldn't work well to leave
the boom microphones live when the aviation headsets are in use because they
would pickup the engine noise. How are motorgliders wired so that only the
headset mics are used when the headsets are plugged in?

I suppose that a "boom mic enable" switch could be used to disable the boom
mics when not in use. But I think there is a way to have the boom
microphones disabled by a switch being opened mechanically when the headset
mic plug is plugged into the mic jack. Standard aviation mic jacks don't
have any way to accommodate that. Any suggestions?

The goal is to make it intuitive for the pilot - and reliable.

Best Regards,

Paul Remde