MiadoreRetroN64 USB Gamepad button mapping

[Deffo]

Hi everybody,
I am trying to play Nintendo64 (mupen64plus) with this gamepads, but I can't manage to correctly configre them.
I am running on Raspberry Pi 5, Recalbox version 9.2.3
By default not all buttons work correctly, so I tried to modify /recalbox/share/system/config/mupen64/InputAutoCfg.ini adding this:

[SWITCH CO.,LTD. Controller (Dinput)]
A Button=button(2)
AnalogDeadzone=4096,4096
AnalogPeak=32768,32768
B Button=button(2)
C Button D=button(0)
C Button L=button(3)
C Button R=button(1)
C Button U=button(9)
DPad D=hat(0 Down)
DPad L=hat(0 Left)
DPad R=hat(0 Right)
DPad U=hat(0 Up)
L Trig=button(4)
Mempak switch=
R Trig=button(5)
Rumblepak switch=
Start=button(12)
X Axis=axis(0-,0+) axis(0+,0-)
Y Axis=axis(1-,1+) axis(1+,1-)
Z Trig=button(6)
mouse=False
plugged=True
plugin=2

and /recalbox/share/system/config/mupen64/mupen64plus.cfg like this:

[SWITCH CO.,LTD. Controller (Dinput)]
A Button = "button(1)"
AnalogDeadzone = "4096,4096"
AnalogPeak = "32768,32768"
B Button = "button(2)"
C Button D = "button(0)"
C Button L = "button(3)"
C Button R = "button(8)"
C Button U = "button(9)"
DPad D = "hat(0 Down)"
DPad L = "hat(0 Left)"
DPad R = "hat(0 Right)"
DPad U = "hat(0 Up)"
L Trig = "button(4)"
Mempak switch = ""
R Trig = "button(5)"
Rumblepak switch = ""
Start = "button(12)"
X Axis = "axis(0-,0+)"
Y Axis = "axis(1-,1+)"
Z Trig = "button(6)"
device = 0
mode = 0
mouse = False
plugged = True
plugin = 2
version = 2

and also adding

n64.configfile=dummy

to recalbox/system/recalbox.conf.

Nothing works, I tried both file with dummy, without dummy and only one of them in turn, both with and without dummy: the controller is not recognized at all.

What is the correct way to configure it?
Thanks in advance