Help identifying Pinout of a rare Namco System 10 “EXIO” gun board J1 edge (Point Blank 3)

[EhmSii]

Hi everyone,
I recently picked up an unusual Namco System 10 / Point Blank 3 board set whose gun stack is labeled EXIO-G PCB 8906970602. It’s not the more common single-daughterboard version—mine has: (see pictures)

• Main “MAIN(M) PCB 8906960402” (JAMMA edge J102)
• Gun "EXIO(G) 8906961602 gun board with a 48-way J1 card-edge
• Memory "EXIO(N)MEM 8906961402" board

No silk-screened pad numbers, and every PB3 manual I’ve found only documents the stock filter board—nothing on this EXIO. The most info I have found about this set of boards is from the following link: https://raw.githubusercontent.com/mamedev/mame/master/src/mame/namco/namcos10.cpp

Cabinet context​

The game is going into a Lethal Enforcers cab that was converted to Point Blank 2. I want to set these games up to be swappable so after I identify what each lead on the board does I can then send those signals through the harness's 10 pin J3 connector that was originally meant to plug into the PB2 gun daughter board. That cab uses Suzo-Happ .45-cal Type-2 guns in the 6-wire layout.

Does anyone have a complete pin-out diagram for the EXIO(G) (8906970602) J1 edge?

I am going to perform a voltage check on each pin this week, ill post the results here