At first it wasn’t clear what Arcade1Up did with the Galaga because only one port was used by their original cheapo joystick, but the 2x4-pin cable works great for the Sanwa joystick, so long as you just use both ports on the interface card. Works out of the box, and the new joystick feels perfect!
I got this wiring harness for my A1up's to connect my Sanwa JLF sticks. And while they work fine for games like the original Pac-Man, connecting likewise to the boards on the Street Fighter cocktail table leads to malfunctioning joystick movement. Ended up stripping the wires and wiring it my self to replacement Cherry DX44 75 gram microswithes for the JLF main body. Perhaps there's another wiring harness solution for cocktail tables?
This is a fantastic adapter for the earlier arcade 1up machine!
Praise God this harness makes joystick installation as simple as 123. Hallelujah.