connector J20

Hi Everybody,

I'm looking for the pinout of jumper "J20" on the mainboard of the squeezebox radio.

I've already found this information from another thread : GND, TX and RX ( https://bufferunderrun.co.uk/squeeze...l-console.html )
(see attached file)

I'm searching a source of 5V ( or stable > 3.7V) on the board

My goal is to graft a bluetooth board to the line in jack.
( https://www.banggood.com/VHM-314-Upg...=CN&ID=6287830 )

Thank you,

Alain

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