OK, so, o n l y 2 months later... 😞 I finally managed to clear some space and probe out the connections.
Here's how my card maps out :
Pins 1, 2, 3, 4, 6 are power -- confimed
5, 9, 10, 13, 14 are GND -- confirmed
15 -- connects to AM7992B, pin 24, Collision+
16 -- connects to AM7992B, pin...