SHVC-SOUND Connector
From SnesLab
The SHVC-SOUND Connector exists only on the 1st revision SNES Motherboard, according to the jwdonal schematic.

The SHVC-Sound Connector in region D6 of the jwdonal schematic
The SHVC-SOUND Connector exists only on the 1st revision SNES Motherboard, according to the jwdonal schematic.