Judging by my zoom with my not really so macro lens the USB on my SJ7 are 5 pin as there are only connectors on one side of that middle thing.
And if i look at the end of my charge cable / mini usb cable i also use to connect camera to PC i have just 5 connectors corresponding to the 5 connectors in the pic below.
And as far as i can see from 5 pin pinout for a 5 pin USB then the pic of mine below are pin 1 on top and then down thru to pin 5
And as i recall pin 1 are +5V - pin 2 are data minus - pin 3 data plus - pin 4 not used ( normally ) - pin 5 5 V minus / GND
So i am thinking if the pin layout are as normal ( and i think it are as the SJ7 would start smoking if i plugged it into a charger, and i can use it as mass storage connected to PC so the 2 data are also normal, that to me at least just leave the pin 4 open for external microphone.
Unlike a 10 pin connector. ( MALE )
So it would seem the botton row in the pic above ( 7 thru 12 ) are the only pins used in a 5 pin plug.
DO NOTE !!!!! i am flying by the seat of my pants here, electronics to me always took a backseat to chemistry when i was a kid.
I am confused too cuz looking at the SJ mic plug it is indee using a 10 pin layout, so the plug in the SJ7 must be 10 pin.
If you look at the 10 pin mic plug above you can also see the 2 x 5 connectors are not the same, so the bottom connectors in that pic above corrolate to the 5 connectors in the SJ7 photo where you can easy make up the connectors.
But you can also see the other 5 connectors in the MIC plug above are another "type" spring loaded so they press down on connectors on that middle thing in the camera pic i just cant see in the photo or IRL with my tired old eyes.
OR ! the SJ mic use a 10 pin connector where 5 would only be needed, and i dont think that's the case.