After a fast test on board i find out this pins:Excellent! i think the protection was used on screen transitions. Will be interesting to see how you did it!
https://www.arcade-museum.com/manuals-videogames/S/Speed-Racer-Namco.pdf
It should be the same as speed racer, techno drive, final lap R etc.
Sadly Final lap R manual shows a filterboard not the real connections. I think the speed racer is correct...
On the diagram 48Pin = 2nd connector, 56Pin = Jamma, I THINK!!
Also check/compare with the namco system 11 schematic that was posted recently to be 100% sure
B7 - View
A19 - Wheel
B19 - Should be Pedal
Need a small circuit to use and send correct value.
How many ppls here think is better a patch to use normal pad ?

Thanks you all !

