This is the Namco 2X6 Kick harness adapter. Like the other JNX kick adapters, it supports CPS1, CPS2, Midway H1, F3 and STV.
The 2X6 is made for the Namco 246 and 256 systems with the 10pin kick connector.
There are 2 sets of 10 pin sockets, 1 set is specifically for the two Capcom fighters on...