Thank you Substring. I also have to mention that I had to do the following in order toget the XCSOURCE Arcade Button/Stick set (www.amazon.de/dp/B01LAUYMQ6) working properly.
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fresh recalbox install
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configure player 1 controls and set INPUT P1 to #0 TWIN USB GAMEPAD
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ssh into recalbox
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make the boot partition writeable with "mount -o remount, rw /boot"
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open cmdline.txt with "nano /boot/cmdline.txt"
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insert "usbhid.quirks=0x810:0xe001:0x040" at the end of the content of "cmdline.txt"
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reboot the system
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IMPORTANT! NOW DO NOT CONFIGURE THE PLAYER 2 CONTROLS just set INPUT P2 to #1 TWIN USB GAMEPAD and it will work and have the same configuration as Player 1 controls (if you would configure the player 2 controls the stick would be inverted in Mame games)
Greetings,
Faxe