Remapping joystick axes through the registry

I'm trying to remap the axes of a Logitech Extreme 3D Pro controller for Hardwar (appid 1500540), which uses DirectInput and only supports binding the throttle to the Z axis (which is yaw on the joystick) or Slider1/2 (which are not mapped). The throttle that I'd like to use as Slider1 is mapped to Rx in joy.cpl

According to the Wine docs, you can add a SZ entry under HKCU\Software\Wine\DirectInput named after the joydev name of the device to remap the axes, in my case I added these entries (first is the joydev device name, the second is what you see through joy.cpl):

"Logitech Logitech Extreme 3D"="X,Y,Z,Slider1,POV1"
"Logitech Extreme 3D"="X,Y,Z,Slider1,POV1"

This doesn't work; when I run joy.cpl I still see the joystick throttle still bound to Rx and not Slider1.

Is this method of remapping joystick axes still supported? I went through the codebase searching for Software\\Wine\\DirectInput and found a couple hits but I couldn't figure out how it was being used or where this mapping is done.

The Wine wiki also mentions grepping the wine debug logs for joydev_enum_device, but that doesn't turn up. The joystick name only turns up in a hid_joystick_enum_device log.

I also found some references to Software\Wine\DirectInput\Joysticks and Software\Wine\DirectInput\Mapping\[username]\[device]\[guid], are these useful/documented anywhere?

Start by tracing the DirectInput registry paths mentioned in the issue and the hid_joystick_enum_device entry point, then compare that path with the Wine wiki's joydev_enum_device guidance. Check how the Joysticks and Mapping registry keys are consumed and whether joy.cpl reflects them; done means establishing whether the documented remapping is supported and identifying the relevant code path or missing behavior.