That's exactly the information I was looking for. Thank you so much David!.
I think this is the most natural way to connect alternative devices to the original GPS holder as a mobile phone to the bike avoiding direct connection to the battery.
By the way, is there a similar connection under or near the seat prepared for connecting devices? In my old motorcycle I had a GPS locator with its own battery and in this way I did not need to connect directly to the battery, preventing the battery drain. (I'm not talking about the Hella connector, useful for other purposes).