Unknown Connection

[lifendet]

Any idea what this connection is for? 

[mike_elliott]

It looks similar to a connector on a Garmin 496 if memory serves me (man that was a long time ago)

[RLCarter]

+1 for the Garmin portable 

[1964-M20E]

That is for the all electric version of Mooney but you have to connect it to China like it says on the label and you need a long extension cord.