Wiring up for 7i92T reflash

Hey all, have accidentally corrupted the firmware with an old mesaflash on a Tormach controller and am trying to bring it back.

I've read a few threads here on the forums and gathered what I could, but I'm still having issues.
I've got the current efinity software (2025) and a FT2232H Mini Module. I've attempted to wire some of the JTAG up according to the specifications in the datasheet for JTAG, but was unsuccessful with that, and also via the wiring diagram here: www.forum.linuxcnc.org/27-driver-boards/...-the-fallback#318881
However, I can't make sense of the diagram.. It seems to mention that pins 1, 3, and 5 are ground, but according to the FT4232H and FT2232H datasheets, those pins are 3.3V VCC. I've tried a couple combinations of wiring but haven't been able to find one that works.

Is there any mapping between the actual bus names (AD1, BD2, etc) and the JTAG pins on the board? I don't mind doing a writeup on the procedure if I can get it working, but I'm just out of ideas here.

Thanks for anyone who can help.

Note that as the schematic says, there's an even/odd swap
because the schematic is for the flat cable, (which plugs on to
the reverse side of the FT4232H),  _not_ the FT4232H